Answer:
See explanation
Step-by-step explanation:
Given
[tex]x = -7.5[/tex]
[tex]Expression: -3.8x + 6[/tex]
Required
Determine Gaira mistake
When Gaira solved the expression, she solved as:
[tex]-3.8x + 6x[/tex]
Giving her
[tex]-3.8x * -7.5 + 6 * -7.5[/tex]
This is incorrect as the correct expression is
[tex]-3.8x + 6[/tex]
and it is solved as follows:
Substitute -7.5 for x in -3.8x + 6
[tex]-3.8x + 6[/tex]
[tex]-3.8 * -7.5 + 6[/tex]
[tex]28.5 + 6[/tex]
[tex]34.5[/tex]
34.5 is the correct solution
Answer:
Gaira made a mistake when substituting the value –7.5 in for x. She multiplied both terms of the expression by –7.5 when she should have only multiplied –3.8 by –7.5. The correct answer is 34.5.
Step-by-step explanation:
Did the ED2020
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How many solutions does the following equation have?
4(y - 30) - 4y + 12
Choose 1 answer:
А
No solutions
Exactly one solution
Infinitely many solutions
Answer:
Infinite solutions
Step-by-step explanation:
After you distribute, you get -108. The equation doesn't have an equal sign, but I don't think that matters. For every possible value of y, you get the answer -108, so the answer is either infinite solutions, or no solutions, depending on what you are trying to get the equation to equal to.
If it's a typo, and the negative is supposed to be an equal sign, the answer is no solutions.
Car A is traveling east at a steady speed of 60 miles per hour. After 2 hours, it is 130 miles east of Johnstown. Car B is traveling east on the same road. Its distance east of Johnstown is represented by the graph. 140 Miles east of Johnstown BO BO 1 2 Time (hours) Where were the two cars in relation to each other when they began traveling? A. Car B was 10 miles east of car A. B. Car B was 20 miles east of car A. C. Car A was 10 miles east of car B. D. Car Awas 60 miles east of car B.
Answer: Its A
Step-by-step explanation:
solve for x????????
Answer:
x=132
Step-by-step explanation:
180-48=132
Hope this helps!
Answer:
[tex]x[/tex] = 132°
Step-by-step explanation:
A straight line is always equal to 180° so
180 - 48 = 132
[tex]x[/tex] = 132°
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?×7/2=3
what does ? equal
Answer:
? = 6/7
Step-by-step explanation:
x * 7/2=3
7/2x=3
2(7/2x)=2(3)
7x=6
x=6/7
Adrian needs to be at school at 7:45 am. It takes him 15 minutes to walk to school, 512 hour to eat breakfast, 0.7 hour to get dressed, and 0.15 hour to shower. What time should he wake up.
Correct question:
Adrian needs to be at school at 7:45 am. It takes him 15 minutes to walk to school, 5/12 hour to eat breakfast, 0.7 hour to get dressed, and 0.15 hour to shower. What time should he wake up.
Answer:
Adrian should wake up by 6.14 am
Step-by-step explanation:
Given;
time to walk to school, = 15 mins
time to eat breakfast = 5/12 hour = 25 mins
time to get dressed = 0.7hour = 42 mins
time to shower = 0.15 hour = 9 mins
time Adrian needs to be in school = 7.45 am
Count from this time he needs to be at school backwards by subtracting the time he will spend before reaching school;
7.45 am - 15 mins = 7.30 am
7.30 am - 25 mins = 7.05 am
7.05 am - 42 mins = 6.23 am
6.23 am - 9 mins = 6.14 am
Therefore, Adrian should wake up by 6.14 am
Explain why f(x-4) shifts to the right, while f(x+3) shifts to the left
Answer:
It is just because f(9x-4) is a subtraction so it goes to the right.
Then the f(x+3) is addition so it goes to left.
Step-by-step explanation:
It is like the opposite of their signs the adding is left, and the subtraction is right.
Select all ordered pairs that satisfy the function
y=2/3x + 1
A. (-3,-1)
B. (-2,-1)
C. (3, 3)
D. (5, 6)
Answer:
its D
Step-by-step explanation:
The ordered pairs that satisfy the function y = 2/3x + 1are (-3,-1) and (3,3)
How to determine the ordered pairs?The function is given as:
y = 2/3x + 1
Next, we test the options
(a) (-3,-1)
This gives
-1 = 2/3 * -3 + 1
Evaluate
-1 = -1 --- this is true
(b) (-2,-1)
This is false because -1 = -1 is true in (a)
(c) (3,3)
This gives
3 = 2/3 * 3 + 1
Evaluate
3 = 3 --- this is true
(d) (5,6)
This gives
6 = 2/3 * 5 + 1
Evaluate
6 = 4.3 --- this is false
Hence, the ordered pairs are (-3,-1) and (3,3)
Read more about linear equations at:
https://brainly.com/question/14323743
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Angle A and B are supplementary angles. If A= 7x + 7 and B = 4x -14, find the measure of B.
Answer: mB=54
Step-by-step explanation:
Find x using 7x+7+4x-14=180. Use x in 4x-14 to find b.
The answer to the question is b=54
Write an expression that describes the length of a rectangle given that the width is 2z and the area is 16z^2 - 10z^2 + 2z
Answer:
3z + 1
Step-by-step explanation:
Area = 16z^2 - 10z^2 + 2z = 6z^2 + 2z = 2z(3z + 1)
Width = 2z
Area of a rectangle is given as:
Area = length × width
hence length = Area/Width
= 2z(3z + 1)/2z
= 3z + 1
Name the angle pair relationship AND find the value of x.
Answer:
Corresponding and x = 5
Step-by-step explanation:
To solve for x set the two equations equal to each other
5x+23 = 7x+13
10 = 2x
x = 5
What is the greatest common factor (GCF) of 528 and 720?
Select one:
A. 18
B. 24
C. 36
D. 48
Answer:
D.48
Step-by-step explanation:
Cup o' Coffee buys its coffee for $1.25 a cup. The coffee shop then sells each cup for $3.75. What is the percent markup for a cup of coffee?
Answer:
47%
Step-by-step explanation:
.375 × .125 = .046875
rounding up, 5 keeps the 7 as is, 7 is greater than 5, therefore the 8, becomes a 9, 9 is greater than 5, so the 6 becomes a 7, .047.
move the decimal three digits to the left and you get, 47%.
Percentage markup is the percent of the difference of the selling price to the buying price of a product. The percent markup for a cup of coffee is 200%.
The percentage markup has to be find out for the cup of coffee.
What is percentage markup?Percentage markup is the percent of the difference of the selling price to the buying price of a product. It can be given as,
[tex]M=\dfrac{\rm SP-C}{C} \times 100[/tex]
Here, [tex]SP[/tex] is the selling price and [tex]C[/tex] is the cost of the product.
Given information-
The Cup o Coffee buys its coffee for $1.25 a cup.
The Cup o Coffee sells its coffee for $1.25 a cup.
To find out the percentage markup for the cup of coffee, put the values in the above formula. Thus,
[tex]M=\dfrac{3.75-1.25}{1.25} \times 100\\M=\dfrac{2.5}{1.25} \times 100\\M=200[/tex]
Hence the percent markup for a cup of coffee is 200%.
Learn more about the percentage markup here;
https://brainly.com/question/26085685
Sean is training for a race. The equation f(x) = 5(x + 1) + 2x represents the number of miles Sean runs during any given training
week (3)
What is f(3)?
Answer:26
Step-by-step explanation:
The value of f(3) is 26.
What is function?An expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).
Given function:
f(x) = 5(x + 1) + 2x
as, we have to find the Sean running in week 3
So, f(3) = 5(3 + 1) +2 (3)
f(3) = 5(4) + 6
f(3) = 20 +6
f(3) =26
Hence, the value of f(3) is 26.
Learn more about function here:
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Bella wants to purchase a t-shirt for $14.89. She knows that sales tax is an additional 5%, or , of the price. To find the exact amount of the sales tax, she should multiply the purchase price by
Answer:
she should multiple by 1.05 and you will get the correct answer
From the picture, we see that this boils down to finding the length of a side of a right triangle. The angle that we know about is 45^ and we know that the length of the side adjacent to the angle is 100 feet. We want to know about the length of the side that is opposite to the angle.
The tangent of an angle alpha is the ratio of the length of the opposite side to the length of the adjacent side
tan45^=x/100
1=x/100
x=100
So, the river is 100 feet across.
Now answer the following question(s).
1. Name the trigonometric ratios that was/were used to evaluate the width of the river?
2. List the most common units angles can be measured in.
Answer:
its should 2
Step-by-step explanation:
Calvin works at a clothing store. He sells 3 pairs of jeans for $66.49 each, 2 shirts $28.99 each, and a belt for $15.40. He also gives a refund for a coat that a customer returned for $89.95. What is the net change in the amount of money for the store?
Answer: 182 / 182.9
Step-by-step explanation:
199.47 +57.98 + 15.40 - 89.95
3 x 66.49 = 199.47
2 x 28.99 = 57.98
since there was only one for the belt and the coat there is no problems for that.
add and subtract all of that and you get 182 or 182.9
i did the problem on my own and then checked it on a calculater. although if it isnt right im very sorry
Answer:
182
Step-by-step explanation:
pls help me (this is a missing assignment
the answer is in the pic.
Answer:
The answer is inside
Step-by-step explanation:
Serena says that if a regression line is drawn correctly in a scatterplot, there will always be the same number of points above the line as there are below the line. Which of these must be a counterexample to her claim?
Answer:
b
Step-by-step explanation:
cause i ik
Answer:
(A) a scatterplot with an odd number of points in which the correct regression line passes directly through 0 of the points
Step-by-step explanation:
The trend line will not pass thru any points
Edge2021>>>>> I just need Brainliest to move on to the next level soo....
A local little league has a total of 80 players, of whom 40% are right handed. how many right handed players are there?
Answer:
32
Step-by-step explanation:
A rectangle has length 6 and height 4. Which of these would tell you that quadrilateral ABCD is definitely not similar to this rectangle? Select all that apply.
Answer:
1) AB=BC
2) m∠ABC=105∘
3) AB=8
4) BC=8
5) BC=2⋅AB
Step-by-step explanation:
A rectangle has length 6 and height 4.
Which of these would tell you that quadrilateral ABCD is definitely not similar to this rectangle? Select all that apply.
1) AB=BC
2) m∠ABC=105∘
3) AB=8
4) BC=8
5) BC=2⋅AB
6) 2⋅AB=3⋅BC
Answer:
A rectangle is a quadrilateral (has four sides). Opposite sides of a rectangle are equal to each other and the diagonals bisect each other. Also, each of the angles in rectangle measure 90°.
1) AB = BC
Opposite sides of a rectangle are equal, hence AB is opposite to CD and BC is opposite to AD. Therefore:
AB = CD, BC = AD
AB ≠ BC
2) m∠ABC = 105°
Each of the angles in a rectangle measure 90°, therefore m∠ABC = 90°. m∠ABC ≠ 105°
3) AB = 8
AB might be the length or height of the rectangle, hence:
AB = 6 or AB = 4. AB ≠ 8
4) BC = 8
BC might be the length or height of the rectangle, hence:
BC = 6 or BC = 4. BC ≠ 8
5) BC = 2AB
If BC is the height = 4, BC ≠ 2AB
6) 2AB = 3BC
If AB is the length of the rectangle and BC is the height of the rectangle then:
2(6) = 3(4)
12 = 12
2AB = 3BC
The density curve below represents the number of minutes Joseph spent getting dressed for school each
morning this past school year.
which of the following statements are true?
Answer: C) the height of the density curve is 0.5
Step-by-step explanation: Khan academy
Answer:
A & B
Step-by-step explanation:
Got it right
Help me with this Math pleaseee
answer:
a.
explanation:
im sure its a.
hope this helped <3 also if wouldn't mind could you pls give me brainliest? (im trying to level up) thanks! :)
WRite all the answers and get 21 points
Answer:
1.
[tex] \frac{4}{5} = \frac{16}{20} [/tex]
2.
[tex] \frac{3}{7} = \frac{15}{35} [/tex]
3.
[tex] \frac{4}{3} = \frac{12}{9} [/tex]
4.
[tex] \frac{13}{15} = \frac{52}{60} [/tex]
5. the enlargement will be 9 inches
[tex] \frac{w}{15} = \frac{3}{5} [/tex]
multiply both sides by 15
[tex] \frac{w}{15} (15) = \frac{3}{5} (15) \\ w = 9[/tex]
6. 12 cm
7. 16
[tex] \frac{4}{2} = \frac{16}{8} [/tex]
4×4=16
8. 3.08
five u.s postal stamps cost $2.20 so we divide that by 5 to get the price of one which is $0.44
so $0.44 × 7 = $3.08
How many zeros are in the product 30 × 10 power of 5
Answer:
6 zeros
Step-by-step explanation:
30 x 10^5
using P.E.M.D.A.S
you do exponents first
10^5 = 100000
then 100000 x 30 = 3000000
and there is 6 zeros
The lenght of a rectangle is 3 inches more then its width. Its perimeter is 42 inches, find the dimensions of the rectangle
Answer:
The problem uses the perimeter formula. P = 2w + 2l where w is the width, and l is the length.
We know the length (l) is 3 inches longer than it's width (or l = w+3). Substitute w +3 into Perimeter equation.
P = 2w + 2(w+3). That simplifies to P = 4w + 6.
Since P + 42, we have 42 = 4w +6. With some simple algebra we find that w = 9 and l = 12.
Determine the number of real solutions there are for 9x2 - 12r + 18 = 0.
A. no real solutions
B. I real solution
C. 2 real solutions
D. 3 real solutions
E. not enough information
Answer:
A. No real Solution
Step-by-step explanation:(1): "x2" was replaced by "x^2".
(32x2 - 12r) + 18 = 0
9x2 - 12r + 18 = 3 • (3x2 - 4r + 6)
3x2 - 4r + 6
3 • (3x2 - 4r + 6) = 0
3 = 0
A company will pay Becky $120 for her first sale. For each sale after that, they will pay her an extra $31.50 per sale. How many sales will Becky have to make to earn at least $2000?
Answer:
About 60 sales.
Step-by-step explanation:
without finding any other angles or sides congruent, determine which pair of triangles can be probed to be congruent by the HL theorem
Answer:
YXZ and NMO
Step-by-step explanation:
The HL (hypotenuse leg) theorem says that if the hypotenuse and one leg of one right triangle is congruent to the hypotenuse and one leg of another right triangle, the 2 triangles are congruent.
Therefore, we can see that the only 2 triangles that can be guaranteed to be congruent are triangles YXZ and NMO.
The radius of a circle is 7 feet . What is the circle's area?
Answer:
The circle's area is 153.93804 feet^2
Step-by-step explanation:
The formula for the area of a circle is [tex]a = \pi r^{2}[/tex]
Using this formula, input the number 7 in for "r" and solve:
a = pi ( 7 )^2
a = pi ( 49 )
a = 153.93804 feet^2
The area of the circle is 153.93804 feet^2. Round the number to the specified decimal point.
solve
sin θ = 4 cos θ
Answer:
θ=arctan(4) or 75.96°
Step-by-step explanation:
sinθ=4cosθ (given)
sinθ/cosθ = 4cosθ/cosθ (divide both sides by cosθ)
sinθ/cosθ = 4 (cancel cosθ)
tanθ=4 (sin/cos is equal to tan)
θ=arctan(4)(transposing tan will give you arctan)
θ=75.96 (calculation will give you this)