Answer:
a
Step-by-step explanation:
x² - 3 = 2x ( subtract 2x from both sides )
x² - 2x - 3 = 0 ← in standard form
consider the factors of the constant term (- 3) which sum to give the coefficient of the x- term (- 2)
the factors are - 3 and + 1 , since
- 3 × + 1 = - 3 and - 3 + 1 = - 2 , then
x² - 2x - 3 = (x - 3)(x + 1) = 0 ← in factored form
equate each factor to zero and solve for x
x + 1 = 0 ⇒ x = - 1
x - 3 = 0 ⇒ x = 3
-[98 + (-67) - (32) + (-12) - 5]
cual es el resultado?
ayuda
Answer: = 18
Espero que esto te ayude.
A number is greater than 8. The same number is less than 10. The inequalities x greater-than 8 and x less-than 10 represent the situation. Which best explains the number of possible solutions to the inequality?
There is one solution because 9 is the only number between 8 and 10. There are a three solutions because 8, 9, and 10 are possible solutions.
There are a three solutions because 8, 9, and 10 are possible solutions
There are a few solutions because there are some fractions and decimals between 8 and 10.
There are infinite solutions because there is always another number between any two numbers.
Answer:
There are a few solutions because there are some fractions and decimals between 8 and 10.
Step-by-step explanation:
Have a great day! Hope this helps!!
Benjamin drives 5 miles in 10 minutes. If he drove one hour in total at the same rate, how far did he go?
Answer:
30 miles because:
Step-by-step explanation:
10 x 6 = 60/1min
5 x 6 = 30miles
A car dealership sells SUVs and passenger cars. For a recent year, 70 more SUVs were sold than passenger cars. If a total of 340 vehicles were sold, determine the number of each type of vehicle sold.
Answer:
135 cars; 205 SUVs
Step-by-step explanation:
Let c = number of cars sold.
Let s = number of SUVs sold.
s = c + 70
c + s = 340
Substitute s in the second equation with c + 70 and solve for c.
c + s = 340
c + c + 70 = 340
2c = 270
c = 135
s = c + 70
s = 135 + 70
s = 205
Answer: 135 cars; 205 SUVs
Dean wants to know what percentage of students at his school are interested in painting. Where could Dean find a sample of students to interview that would be most representative of the entire student body?
Question 2 options:
a) a music class
b) the school cafeteria
c) a basketball game
d) the county library
Answer:
B
Step-by-step explanation:
Everyone eats whereas not everyone would enjoy being at the other options
Which is NOT a property of all similar triangles?
A The corresponding angles are congruent.
B The perimeters are in the same ratio as the corresponding sides.
CThe corresponding sides are congruent.
D) The altitudes are in the same ratio as the corresponding sides.
Answer:
C) The corresponding sides are congruent.
Step-by-step explanation:
Option C is the correct answer.
Hope it helps you in your learning process.
Math hw areas urgent
Answer:
See below.
Step-by-step explanation:
The side of the square is k.
The area of the square is k².
The diameter of the circle is k.
For a circle, radius = diameter/2.
The radius of the circle is k/2.
Formula for area of circle: A = πr².
Here, the radius, r, is k/2.
The area of the circle is π(k/2)² = (πk²)/4
The shaded area is the difference between the area of the square and the area of the circle.
shaded area = k² - (πk²)/4
We are told that the shaded area = A
A = k² - (πk²)/4
Multiply both sides of the equation above by 4.
4A = 4k² - πk²
On a piano, the formula to determine the frequency, f, for the G above A440 is
F=440 2 10/12
12 Which of the following is
equivalent to f?
• 440-10 /212
• 440•12 /210
• 440-19512
O 440-12/210
Using the transformation of an exponent to a power, the formula that is equivalent to f is given by:
[tex]440\sqrt[12]{2^{10}}[/tex]
How to transform an exponent to a power?It happens according to the following rule:
[tex]a^{\frac{n}{m}} = \sqrt[m]{a^n}[/tex]
In this problem, the rule for f is given by:
[tex]440(2)^{\frac{10}{12}}[/tex]
Hence, applying the rule, the equivalent formula is given by:
[tex]440\sqrt[12]{2^{10}}[/tex]
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Answer:
C
Step-by-step explanation:
A triangle on a coordinate plane is translated according to the rule t–8, 4(x, y). which is another way to write this rule? (x, y) → (x 4, y – 8) (x, y) → (x – 4, y – 8) (x, y) → (x – 8, y 4) (x, y) → (x 8, y – 4)
The rule is a translation rule, and another way of writing the rule t -8, 4(x, y) is (x - 8, y + 4)
How to rewrite the transformation rule?The rule is given as:
t -8, 4(x, y)
The above rule means that:
A translation of 8 units right and 4 units up.
This is represented as:
(x - 8, y + 4)
Hence, another way of writing the rule t -8, 4(x, y) is (x - 8, y + 4)
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Answer:
C: (x, y) → (x – 8, y + 4)
Step-by-step explanation:
someone help me pls
Find The Mean, Median, and mode range of 13, 25, 7, 28, 42, 7, 15, 23, 1, 17.
Step-by-step explanation:
Mean :
13 + 25 + 7 + 28 + 42 + 7 + 15 + 23 + 1 + 17.
= 178
178 ÷ 10
= 17.8
Median =
13, 25, 7, 28, (42, 7,) 15, 23, 1, 17
= 42 + 17
= 59 ÷ 2
= 29.5
Range :
42 - 1
= 41
Hope it helps :))
Answer:
Mean- 17.8 Median- 16 Mode- 17.8
Step-by-step explanation:
1. Put the numbers in ascending order.
1, 7, 7, 13, 15, 17, 23, 25, 28, 42
2. Look for the median. The median is the number located in the middle of a set of numbers. In this case, the median is going to be between 15 and 17 because they are both in the middle. This means that the median will be 16.
1, 7, 7, 13, 15, 17, 23, 25, 28, 42
3. Find the mode. The mode is the number you see the most in a set of numbers. In this case, there are two 7's so 7 is the mode of this set.
1, 7, 7, 13, 15, 17, 23, 25, 28, 42
4. Find the mean. The mean is the overall average of a set of numbers. To find the average, find the sum of all the numbers in the set and divide it by the number of integers there are. In this case, there are ten integers, so we'll find the sum (178) and divide it by 10 to get a mean of 17.8.
[tex]\frac{1+7+7+13+15+17+23+25+28+42}{10}[/tex] = 17.8
5. Find the range. The range is basically the difference between the lowest and highest values in a set of numbers. The lowest number is 1 and the highest is 42. So, we'll subtract the two to get a range of 41.
1, 7, 7, 13, 15, 17, 23, 25, 28, 42
42 - 1 = 41
10,14,18,22… find the next two terms
Answer: 26 and 30
Step-by-step explanation: The pattern is adding 4, so 10 + 4 is 14, 14 + 4 is 18, and 18 + 4 is 22.
So you add 4.
22 + 4 is 26.
26 + 4 is 30.
Answer:
26, 30 are the next two terms
Step-by-step explanation:
On September 1, a dress was priced at $90. On October 1, the price was reduced by 20%. On
November 1, the price was further reduced by 25% of the October 1 price and marked FINAL.
What percent of the original price was the FINAL price?
F.
G.
H.
40%
45%
55%
60%
77.5%
J.
K.
Answer:
I wouldn't say this is entirely correct, but I think it's 45%.
Step-by-step explanation:
If you started with $90 and it was reduced 20%, than 25% MORE, the final percentage that was lowered would be the 20% and 25% added together.
The answer is 45%.
(Please do tell me if I got this wrong!!)
The original price reduced to 60%.
What is a percentage?A percentage is a ratio or number that can be expressed as a fraction of 100. Additionally, it is denoted by the symbol "%."
On September 1, a dress was priced at $90. On October 1, the price was reduced by 20%.
That means,
the price is now = $90 - (90 x 20 /100) = $72
On November 1, the price was further reduced by 25% of the October 1 price.
The price is now = $72 - ( 72 x 25 / 100) = $54
To find the percentage of original price;
The percentage of original price
= 5400 / 90
= 60%
Therefore, the final price is 60% of the original price.
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can someone help I'm stuck on this question thanks
Answer:2
Step-by-step explana2tion:
AS]
can someone help me with this? Thank you!
Answer:
384
Step-by-step explanation:
W x L x 2 + H x L x 2 + W x H x 2 = Formula for Surface area of a rectangular prism
9x12x2=216, 4x12x2=96, 9x4x2=72 Then add them all up
216+96+72=384
Brainly would help, thank you and have a good day.
FYI I did not copy this took ten minutes to do pls no report... thanks
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Surface area of a rectangular prism is ~
[tex]\qquad \sf \dashrightarrow \: 2(lb + bh + lh)[/tex]
l = Length = 12 ftb = width = 9 fth = height = 4 ft[tex]\qquad \sf \dashrightarrow \: 2 \{(12 \times 9)+ (9 \times 4) +( 12 \times 4) \}[/tex]
[tex]\qquad \sf \dashrightarrow \: 2 \{(108)+ (36) +( 48) \}[/tex]
[tex]\qquad \sf \dashrightarrow \: 2 \{192\}[/tex]
[tex]\qquad \sf \dashrightarrow \:384 \: \: ft {}^{2} [/tex]
can yall tell me what im doing wrong? for 50 points.
Crackdown result: DFBG
[tex]\sf slope \ (m): \dfrac{y_2-y_1}{x_2-x_1}[/tex]
1)
[tex]\rightarrow \sf m = \dfrac{-13-19}{-1-3}[/tex]
simplify
[tex]\rightarrow \sf m=8[/tex]
2) take two points: (-1,-1), (0, 1)
[tex]\rightarrow \sf m = \dfrac{1-(-1)}{0-(-1)}[/tex]
simplify
[tex]\rightarrow \sf m = 2[/tex]
3) take two points: (1, -8), (2, -16)
[tex]\rightarrow \sf m = \dfrac{-16-(-8)}{2-1}[/tex]
simplify
[tex]\rightarrow \sf m = -8[/tex]
4)
[tex]\rightarrow \sf m = \dfrac{8-(-10)}{0-9}[/tex]
simplify
[tex]\rightarrow \sf m = -2[/tex]
#1
(3,19)(-1,-13)Slope
m=-13-19/-1-3=-32/-4=8D#2
(0,1)(-1,-1)Slope:-
m=-1-1/-1=2F#3
(1,-8)(2,-16)Slope
m=-16+8/2-1=-8B#4
(9,-10)(0,8)Slope:-
m=8+10/0-9m=18/-9m=-2GCode is
DFBGIs median a measure of center or a measure of variation
a measure of center
b. measure of variation
Answer:
a
Step-by-step explanation:
Solve for x in the equation x squared 10 x 12 = 36. x = –12 or x = 2 x = –11 or x = 1 x = –2 or x = 12 x = –1 or x = 11
Quadratic equations are equations that has a leading degree of 2. The value of x from the given quadratic equation is 2 or -12
Quadaratic equationQuadratic equations are equations that has a leading degree of 2
GIven the quadratic equation expressed as x^2 + 10x + 12 = 36
Rewrite
x^2 + 10x - 36 + 12 = 0
x^2 + 10x - 24 = 0
Factorize
x^2 + 12x -2x - 24 = 0
x(x+12) -2(x+12) = 0
x - 2 = 0 and x = -12
x =2 or -12
Hence the value of x from the given quadratic equation is 2 or -12
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Answer:
A on edge 23'
Step-by-step explanation:
because i said so
Which graph represents the function y = 2x - 4?
The graph of function y = 2x - 4 is shown in figure.
What is Equation of line?The equation of line in point-slope form passing through the points
(x₁ , y₁) and (x₂, y₂) with slope m is defined as;
⇒ y - y₁ = m (x - x₁)
Where, m = (y₂ - y₁) / (x₂ - x₁)
Given that;
Equation of line is,
⇒ y = 2x - 4
Now, WE know that;
Standard form of equation of line is,
y = mx + c
Where, m is slope and c is y - intercept.
Here, Function is,
y = 2x - 4
Hence, y - intercept = - 4
Thus, The graph of function y = 2x - 4 is shown in figure with y - intercept (0, - 4).
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Question 1 Multiple Choice Worth 2 points)
(07.04 MC)
Given a polynomial function f(x) = -x + 2x + 1 and an exponential function g(x) = 2x, what key features do f(x) and g(x) have in common?
Both f(x) and g(x) decrease over the interval of (1.c).
Both f(x) and g(x) have the same range of (-, 2).
Both tx) and g(x) have the same x-intercept of (-1,0).
Both f(x) and g(x) have the same y-intercept of (0, 1).
The graph of f(x) = -x² + 2x + 1 and g(x) = 2ˣ, have the same y-intercept of (0, 1)
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables.
Given the polynomial function f(x) = -x² + 2x + 1 and an exponential function g(x) = 2ˣ
From the graph of f(x) = -x² + 2x + 1 and g(x) = 2ˣ, have the same y-intercept of (0, 1)
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Is the line of best fit accurate for the data shown?
(A) Yes, because it touches the y-axis
(B) Yes, because there are about the same number of points above the line as below it
(C) No, because the line does not touch any points
(D) No, because the line should touch every point
5/6 + 5/6 = ?
? = 10/6
10/6= 5/3
Answer:
10/6 = 10/6
↓
1 4/6 = 10/6
Step-by-step explanation:
5/6 + 5/6 = 10/6
↓
1 4/6
10/6 ÷ 2 = 5/3
10/6 = 10/6
1 4/6 = 10/6
Please help, I don't understand these exercises.
Step-by-step explanation:
the awnser enlarges, preserves, scale reduces
What is the value of x?
Step-by-step explanation: To find the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to find the result.
find the value of each variable
x=
y=
z=
Answer:
Step-by-step explanation:
A 45 degree angle in a right triangle produces 2 equal sides. In this case z and the perpendicular line are equal. So that's were we'll start. Then you move on to the 60 degree angle to get x and y.
Finding z
z^2 + z^2 = (24√2) Combine the left
2z^2 = 24^2 * 2 Divide both sides by 2
2z^2/2 = 24^2/2
z^2 = 24^2 Take the square root of both sides
√z^2 = √24^2
z = 24
Finding x and y
The perpendicular = 24. Because it is a 60 degree angle that's given, we can do this without a calculator.
Tan 60 = opposite over adjacent
sqrt(3) = Perpendicular / z Multiply both sides by z
z*sqrt(3) = perpendicular
The above calculation tells us the perpendicular is 24
z*sqrt(3) = 24 Divide by sqrt 3
z = 24/√3
z = 24/1.73
z = 8√3
Finding x
Use Pythagoras to determine x
Perpendicular^2 + (8√3)^2 = x^2
24^2 + 8^2*3 = x^2
576 + 192 = x^2
768 = x^2
√x^2 = √768
x = 27.71
if 45% of an item 75.00 what is the original price
Answer: 157.5
Step-by-step explanation:
I would add 45 % again and you'd get 90 % or
150.00 the find 10 % of 75 which is 10*75/100 or 7.5
then add 150.00+ 7.5 = 157.5
A prism has a volume of 225 cubic meters.
A prism has a length of 7.5 meters, width of w, and height of 5 meters.
Which is the correct substitution for finding the width of the prism?
V = l w h. 225 = 7.5 + w + 5.
V = l w h. 5 = 15 times 225 times h.
V = l w h. 7.5 = 7.5 times w times 5.
V = l w h. 225 = 7.5 times w times 5.
Mark this and return
Answer: Its D
Step-by-step explanation:
What number does y stand for in this equation?
2y - 7 = 35
A
28
B.
В
21
С
14
D
9
Josh invested $450 at 0.5% simple interest for 2 years. How much is his total account balance at the end of 2 years?
Please help me? =)
Answer:
The total account balance would be $454.50
Step-by-step explanation:
0
R
(r-12)
>R
-
(3r + 5)
+
P
S
Solve for x:
O
What is mZP?
Step-by-step explanation:
this is a nice parallelogram.
that means it has 2 pairs of equal and parallel sides (opposite of each other), 2 pairs of equal angles (also opposite of each other).
as in every quadrilateral the sum of all angles is 360°.
and because of the 2 pairs of equal (yet opposite) angles, every angle combines with one of its neighbors to 180°.
so,
(3x + 5) + (8x - 12) = 180
3x + 5 + 8x - 12 = 180
11x - 7 = 180
11x = 187
x = 17
and then the angle P is
3x + 5 = 3×17 + 5 = 51 + 5 = 56°
What is the correct classification for ∠JML?
obtuse
straight
right
acute
Ray M J and Ray M L are connected at point P, forming angle J M L. A ray M K sharing the same point forms a bisector. A ray M H also sharing the same point from the diagonally down from the right. The angle J M K measure 41 degrees and angle L M H measure 132 degrees.
The correct classification for the angle JML is an acute angle.
What is an acute angle?
An acute angle has a measure, or it's smaller, than a right angle.
Therefore, the acute angle is the small angle which is less than 90°
let's find the measure of ∠JML
Hence,
∠JML = ∠JMK + ∠KML
∠KML = 180 - 132 = 48 degrees.
Therefore,
∠JML = 41 + 48 = 89 degrees.
Therefore, the correct classification for the angle JML is an acute angle.
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