14. Evaluate: 9a2 – 2b2 when a =
4 and b =7
Answer:
9a2-2b2=9 times 4 times 2 - 2 times 7 times 2=72-28=44
The answer is 44, hoped I helped :P
My brother need your help, it’s too hard for him,can you help him..????!!!!
Answer:
Slope: Ordered Pair: Slope Formala:
0 (0,0) and (1,0) (m = 0)
-2 (-2,-1) and (0,1) (m = -1)
1/2 (1,2) and (-4,12) (m = 9)
Im sorry i can't do the graph but i hope that help ❤️
What are the three ways to determine if two triangles are similar
Answer:Similar triangles are easy to identify because you can apply three theorems specific to triangles. These three theorems, known as Angle - Angle (AA), Side - Angle - Side (SAS), and Side - Side - Side (SSS), are foolproof methods for determining similarity in triangles.
hope this helped! (if ya did a brainliest that would really help)
The three ways to determine if two triangles are similar are Angle - Angle (AA), Side - Angle - Side (SAS), and Side - Side - Side (SSS)
What are similar triangle?Two triangles are said to be similar if their corresponding angles are congruent and the corresponding sides are in proportion.
Two triangles are similar if they meet one of the following criteria. : Two pairs of corresponding angles are equal. : Three pairs of corresponding sides are proportional. : Two pairs of corresponding sides are proportional and the corresponding angles between them are equal.
Also, Two triangles are similar if they have the same ratio of corresponding sides and equal pair of corresponding angles. If two or more figures have the same shape, but their sizes are different, then such objects are called similar figures.
The three theorems to identify similar triangles are, Angle - Angle (AA), Side - Angle - Side (SAS), and Side - Side - Side (SSS)
That explained as, two pairs of angles are congruent (AA) (2) two pairs of sides are proportional, and the included angles are congruent (SAS), or (3) if three pairs of sides are proportional (SSS).
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What is the average rate of change for the following graph over the interval 1 ≤ x ≤ 3?
Answer:
The average rate of change is 1 over 3, or just 1/3. The y-values change 1 unit every time the x-values change 3 units, on this interval!
We want to find the average rate of change of the graph on the interval 1 ≤ x ≤ 3.
The correct option is B: -4
We know that for a given function f(x) the average rate of change on the interval a ≤ x ≤ b is given by:
[tex]\frac{f(b) - f(a)}{b - a}[/tex]
Here we have the interval 1 ≤ x ≤ 3, and by looking at the graph we can see that:
f(3) = 1
f(1) = 9
Then the average rate of change is:
[tex]\frac{1 - 9}{3 - 1} = -4[/tex]
So the correct option is B.
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A family plants two trees.
Tree A is 2 feet tall and grows 16 inches per year.
Tree B is 4 feet tall and grows 8 inches per year.
Which equation represents the year, x, when the height of the trees are the same?
A
2x+43=4x+23
B
43x+2=23x+4
C
2x+16=4x+8
D
16x+2=8x+4
Answer:
D js hu sisngsizkabs s ah w
Use divisibility rules to determine whether the number is divisible by 2, 3, 4, 5, 6, 8, 9, and 10.
1. 1200
2. 1515
3. 1071
Answer:
Divisibility Rules: 2, 3, 4, 5, 6, 9, and 10
A number aa is divisible by the number bb if a \div ba÷b has a remainder of zero (00). For example, 15 divided by 3 is exactly 5 which implies that its remainder is zero. We then say that 15 is divisible by 3.
In our other lesson, we discussed the divisibility rules for 7, 11, and 12. This time, we will cover the divisibility rules or tests for 2, 3, 4, 5, 6, 9, and 10. Believe me, you will be able to learn them very quickly because you may not know that you already have a basic and intuitive understanding of it. For instance, it is obvious that all even numbers are divisible by 2. That is pretty much the divisibility rule for 2. The goal of this divisibility rules lesson is to formalize what you already know.
3. 1071
Step-by-step explanation:
A number is divisible by 3 if the sum of its digits is divisible by 3. A number is divisible by 9 if the sum of its digits is divisible by 9. And a number is divisible by 6 if it is divisible by 2 (even number) and by 3.
Find the area of the shaded region (everything but the circles). Express your answer in terms of . Use pi to represent the symbol For example: would be typed as 32pi
Answer:
The area of the shaded region is (540 - 65.25pi) in²
Step-by-step explanation:
The remaining part of the question which is an image is attached below.
Step-by-step explanation:
To determine the area of the shaded region, that will be the difference between the area of the rectangle and the sum of the areas of the three circles.
First, we will determine the area of the rectangle, which is given by
Area of rectangle = Length × Breadth
In the figure, Breadth = 18 in
and Length = 12 in + 9 in + 6 in + 3 in
∴ Length = 30 in
Hence,
Area of rectangle = 30 in × 18 in
Area of rectangle = 540 in²
Now, we will determine the areas of the circles one after the other
For the smallest circle
From the figure, the diameter of the smallest circle is 6 in
From Radius = Diameter / 2
Hence,
Radius of the smallest circle = 6 in / 2 = 3 in
Area of a circle is given by
Area of circle = πr²
∴ For the smallest circle
Area of the smallest circle = π×3² = 9π in²
Hence, area of the smallest circle is 9pi in²
For the circle in the middle
Diameter of the circle in the middle is 9 in
∴ Radius of the circle in the middle = 9 in / 2 = 4.5 in
For the area of the circle in the middle
Area of the circle in the middle = π × 4.5² = 20.25π in²
Hence, Area of the circle in the middle is 20.25pi in²
For the largest circle
From the figure, the diameter of the largest circle is 12 in
Hence, radius of the largest circle = 12 in / 2 = 6 in
∴ For the largest circle
Area of the largest circle = π×6² = 36π in²
Hence, area of the largest circle is 36pi in²
Sum of the areas of the three circles = 9pi in² + 20.25pi in² + 36pi in²
Sum of the areas of the three circles = 65.25pi in²
Now,
Area of the shaded region = Area of the rectangle - Sum of the areas of the three circles
∴ Area of the shaded region = 540 in² - 65.25pi in²
Area of the shaded region = (540 - 65.25pi) in²
Hence, the area of the shaded region is (540 - 65.25pi) in²
A map key shows that 3cm represents 60 miles. Which proportion could be used to find m, the number of miles represented by 8 centimeters?
A: 3/60=m/8
B: 3/8=m/60
C: 3/5=60/m
D: 3/60=8/m
Answer:
D
Step-by-step explanation:
Rewrite the following equation in standard form. y = 6x − 3
Step-by-step explanation:
Y
[tex]if \: y \: equals \: to \: 0 \\ 0 = 6x - 3 \\ 3 = 6x \\ \frac{1}{2} = x \\ sub \: value \: of \: x \: in \: irt \: equation \\ y = 6( \frac{1}{2} ) - 3 \\ y = 0[/tex]
Maria pays a yearly fee of $3 to her swimming club and $2
per lesson. Carmen pays a yearly fee of $5 and $2 per lesson.
After how many lessons will Maria and Carmen have paid the
same amount? Write an equation and explain your answer.
Answer:
They will have never paid the same amount
Step-by-step explanation:
the equation 3+2x=5+2x simplifies to 3=5 which is not a true statement
Carmen always pays a higher amount than Maria where the fee for each lesson is the same for both Carmen and Maria.
What is an equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
We have,
Maria:
Yearly fee = $3
Fee per lesson = $2
Carmen:
Yearly fee = $5
Fee per lesson = $2
The equations to represent the amount A after x lesson:
Maria:
A = 3 + 2x
Carmen:
A = 5 + 2x
The number of lessons at which both have paid the same amount:
3 + 2x = 5 + 2x
0 = 2
There is no solution.
Thus,
Carmen always pays a higher amount than Maria where the fee for each lesson is the same for both Carmen and Maria.
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Ms. Lee went and got a haircut for $55.00, and the tax was 7%. She also left a 30% gratuity for the hairdresser.
PLEASEEEE SOMEONE HELPPPP I DONT GET IT ITS FOR A GRADEEEEE :((((
Answer: The answers 14
Step-by-step explanation:
Mike is on vacation and decides to rent a bike for part of the week. The rental cost is represented by the function c(d) = 25+20d, where is the number of days of use and c(d) is the total cost for d days of use. How much does the bike cost Mike if he uses it for 4 days?
Answer:
Cost for 4 days is 105
Step-by-step explanation:
To get the cost for 4 days, we simply substitute 4 for the value of d in the equation
Thus, we have
c(4) = 25 + 4(20)
C(4) = 25 + 80
C(4) = 105
For a given recipe, 12 cups of flour are mixed with 24 cups of sugar. How many cups of sugar should be used if 21 cups of flour are used?
Assuming a constant ratio, fill out the table of equivalent ratios until you have found the value of x.
Answer:
1/2 hopefully this will help.
Step-by-step explanation:
Simplify -4x-3+6x-2 simplify
Answer:
2x-5
Step-by-step explanation:
Answer:
2x - 5
Step-by-step explanation:
combine like terms
-4x and + 6x = 2x
-3 and -2 = -5
2x - 5
A recipe calls for 1/2 cup of ingredient A for every 1 2/5 cups of ingredient B. You use 3 cups of ingredient A. How many cups of ingredient B do you need?
Answer:
8.4cups
Step-by-step explanation:
Given:
recipe calls for 1/2 cup of ingredient A for every 1 2/5 cups of ingredient B.
By using the ratio of both ingredients
Let X= amount of ingredient A in cups
Let Y= amount of ingredient B in cups
We can interpret like this
(X/Y) = (1/2 cup)/(1 2/5 cups)
1 2/5 cups = 7/5 cups
(X/Y) = (1/2)/(7/5)
(7/5)X= (1/2)Y
We can find the value of Y
Y= 2*(7/5)X
Y = (14/5)X
You use 3 cups of ingredient A. Then X= 3cups, then Y=
Y = (14/5)× 3
Y=8.4cups
There are 8.4cups cups of ingredient B do you needed
helpp ill mark u as brain list
Answer:
1 its linear
and 2 it goes through the origin so its most likely proportional.
-0.64x+0.44x=5.8 solve for x
Answer:
x=-29
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
−0.64x+0.44x=5.8
(−0.64x+0.44x)=5.8(Combine Like Terms)
−0.2x=5.8
−0.2x=5.8
Step 2: Divide both sides by -0.2.
-0.2x/-0.2=5.8/-0.2
x=-29
Which is the best estimate of 11/12 x 4/5
Answer:
44/60
Step-by-step explanation:
times the top by the bottom.
hello look at picture
Answer:
No
Step-by-step explanation:
if it is a function is to see if there are two of the same x-intercept (which make a vertical line). If there is, then it is NOT a function
Answer:
No it does not
Step-by-step explanation:
pls mark brainliest
I need help as fast as possible
Answer:
No, because the relation does not pass the vertical line test for every possible input
Step-by-step explanation:
8) You have a line segment that is split into two (not equal) pieces. You know the length of the original
segment and the length of the smaller piece. Explain how you would find the length of the larger piece.
Answer: You would take the original piece amount and subtract the smaller amount from that. This will give you the amount of the unknown piece.
Step-by-step explanation:
Solve 2/3 divided by - 1 1/3
Answer:
-0.5
Step-by-step explanation:
Please helppp.
Then for 13 it’s asking: is c a scaled copy of B?
And for 14 it’s asking: is c a scaled copy of r?
Please help meee it’s graded and due today I’ll give 30 points.
Answer:
Yes, C is a scaled copy of B.
Step-by-step explanation:
The scale factor of C from B is 1/9th.
C is also a scaled copy of R. The scale factor is 1/36th.
The scale factor of B to R is 1/4th.
Wat is the rate of change for this equation?
3x -2y = 6
Answer:
rate of change (slope)=3/2
Step-by-step explanation:
3x-2y=6
-2y=-3x+6
y=3/2x-3
4x^4-6x^2+5
help asappp
Answer:
220x+5
Step-by-step explanation:
Do I simplify? if yes, here's an explanation
4x^4 that means, 4x*4x*4x*4x, do 4*4*4*4=256,so the first part is 256x.
6x^2 that means, 6*6=36, 36x
Then do , 256x-36x+5=220x+5
That's your answer!
Hope this helps!
In the equation y= 2x + 7, the slope is 7.
True
False
Answer:
False I did this And the slope is 2
Solve.
3x + 21 = -33
a. -18
b. 18
c. -4
d. 4
Answer:
-18
Step-by-step explanation:
I just had this question and the answer is -18 because 3x+21-21=-31-21 to get - 18
Answer:
A). X = -18
Step-by-step explanation:
-18 times 3 + 21 is -33. When you have a hard time figuing out these sort of problems, I suggest you should get each choice that is given. Put one of these choices one at a time in the equation and see if it will equal -33. To do this, you put the number and substiture it for x. This is an easy way of solving this problem especially when it is multiple choice.
Which expression is equivalent to (12x−5y−1)+(17y−4−13x−3y)?
which one is it?
1. −4x+12y−5
2. −x+9y−5
3. −x−25y+5
4. 25x−19y+3
The expression that is equivalent to the given expression is -x+9y−5. The correct option is 2. −x+9y−5
From the question,
We are to determine the expression which is equivalent to the given expression.
First, we will simplify the given expression
The given expression is (12x−5y−1)+(17y−4−13x−3y)
The expression can be simplified as shown below
(12x−5y−1)+(17y−4−13x−3y)
12x−5y−1+17y−4−13x−3y
Collect like terms
12x−13x+17y−5y−3y−4−1
This becomes
-x+9y−5
The simplified expression is -x+9y−5
Hence, the expression that is equivalent to the given expression is -x+9y−5. The correct option is 2. −x+9y−5
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What is four-fifths of three-fourths?
A. 3/5
B. 3/4
C. 4/20
D. 3/20
Answer:
3/5
Step-by-step explanation:
Answer:
3/5
Step-by-step explanation: