Mathematics High School

If 7x−7y=4 is a true equation, what would be the value of
5(7x−7y)

Answers

Answer 1

Answer:

20

Step-by-step explanation:

Since that is a true equation, you can substitute 7x - 7 y for 4 and simplify.

5(7x - 7y)

5(4)

20

Related Questions

Malachy was thinking of a number. Malachy halves the number and gets an answer of 67.3.
Form an equation with x from the information.​

Answers

Step-by-step explanation:

Let the number be x.

ATQ,

Malachy halves the number and gets an answer of 67.3.

[tex]\dfrac{x}{2}=67.3[/tex]

This the equation for the given statement.

It can also be written as :

[tex]x=2\times 67.3\\\\x=134.6[/tex]

Hence, this is the required solution.

Steve’s IQ increases by 0.25% each
day that he attends his algebra class.
After the first day of class, he has
an IQ of 90. What will it be after
attending all 180 classes this year?

Answers

Answer:

141

Step-by-step explanation:

because i have the answer key

Find the percent error in this situation:
Estimated value: 145
Actual value: 189

Answers

Answer:

30.3% im so sorry if this is wrong if it is u can report this :(

Step-by-step explanation:

Answer:

23.3%

Step-by-step explanation:

You have to first take the estimated value - the actual value

= 145-189 = -44

Then you want to take -44 divide the actual value which is 189

= -44 / 189= 0.232804233

Lastly, you want to take 0.232804233 and multiply it by 100

= 0.232804233 x 100= 23.28042328

Round that number to get

=23.3%

The perimeter of AXYZ is __
units

Answers

Answer:

Area of triangle: 1/2*base*height

Here height= 4

Base= 8

Thus area= 1/2*4*8

=4*4

=16

Not understanding this

Answers

Answer:

120 yd

Step-by-step explanation:

To find the volume, we have to multiply the length, width, and height. We have 8, 6, and 10 as our length, width, and height. First, let's go with the length and width. 8 times 6 is 48. Since it's a triangle, we have to divide by 2. 48 divided by 2 is 24. Now let's multiply by the height. 24 times 5 is 120, so that will be your volume.

HELPP!!
Find the slope of the line that passes through these two point????

Answers

The slope is 2/1 and simplified is 2.


Solve the linear equation x + 4 + 3x = 72. State the property that justifies your first step and why you chose it

Please Help!!!!!!!!!

Answers

Answer:

x=17

Step-by-step explanation:

x+4+3x=72

4x+4-4=72-4

4x/4=68/4

x=17

Associative property of addition

Answer: x  =  17

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

HELP PLSSS

Which line is a graph of the equation: 2x + 5y = -10?
O line a
line b
linec
line d

Answers

Answer:

LINE D

Step-by-step explanation:

Which rule explains why these triangles are congruent?

AAS
ASA
SSS
SAS
These triangles cannot be congruent

Answers

SAS, those lines are the S-(sides) and the angle is in the middle of that makes sense, I hope this helped!

LESSON
Solve the problems.
Amanda has a board that is 7 feet long. How many-foot sections can she cut
from this board?

A 28 sections
B
11 sections
С
1 sections
D section
2 A restaurant has tray of baked pasta left over after dinner. If 6 workers share the
rombinins haldinnctbfiantiantarantamil-hindrint2
L
P!

Answers

C is the answer hope that helps have a good day

Triangle ABC is graphed on a coordinate plane with vertices at A(-3, 7), B(9,-8), and C(-5, -6). If triangle ABC is dilated
by a scale factor of 2 with the origin as the center of dilation to create A'B'C', what will be the coordinates of the dilated
vertex of B'?

Answers

Answer:

  B' = (18, -16)

Step-by-step explanation:

Dilating means to stretch or shrink a figure. The scale factor tells us how much we are stretching or shrinking. The scale factor is 2, so the coordinates are multiplied by 2.

PLEASE HELP

What type of association does the graph show between x and y?

Answers

Answer: Linear association

Step-by-step explanation:

A store purchases a bicycle from the manufacturer for $150. The store then sells the bicycle for $215. By what percentage did the store mark up the bicycle?

Answers

I believe it’s a 43% increase! Hope this helps
It is a 70 percent increase the person above is wrong

Olivia wants to know the proportion of students at her school who use a

certain social media app. She interviews a random sample of students at

her school. She finds that 30% of the students in the sample use the app.

What conclusion can she draw from the sample?

А

It is likely that about 30% of the students at her school use the app.

B Exactly 30% of the students at her school use the app.

Every random sample would find that 30% of the students use

the app

It is likely that 30% of the students at her school were selected for

the sample.

Answers

Answer:

A

Step-by-step explanation:

Random sampling is a sampling method where each sample has an equal chance of being chosen. The random sample chosen is meant to be an unbiased representation of the population.

If 30% of the sample uses the app, it means that 30% of the population are likely to use the app

When changing 67, 430,000 to scientific notation, how many places is the decimal point moved? ​

Answers

it would move 7 places to the left

Paul won 37 super bouncy balls playing hoops at county fair. At school he gave two to every student in his math class. He only had 3 remaining. How many students are in his class?

Answers

Answer:

17 students

Step-by-step explanation:

If he started with 37 and ended with 3 we have to subtract those three first so that we know how many we are actually working with so, 37-3=34. 34 balls is the amount distributed among the class. 34/2 is 17.

y=-1/2x + 4 1/2 what is X!?

Answers

Answer:

5

Step-by-step explanation:

The volume of a cylinder whose radius is 2r cm and height h/4cm is______________

Answers

Answer:

V=πrh/2

Step-by-step explanation:

volume of a cylinder can be calculated using below formula

V=πr2h

Given:

radius =2r cm

height= h/4cm

If we substitute the given value into the formula we have πrh/2

V= π ×(2r) ×(h/4)

Simplyfying

V=πrh/2

Hence, The volume of a cylinder is V=πrh/2

Could 8 be a solution? Why or why not?
x2 = 49

Answers

no because if you substitute 8 for x, you would get 16=49. which is not true

Answer:

it cannot be

Step-by-step explanation:

x²=49

x=√49

x=7

Thus answer is 7 and not 8

WILL GIVE BRAINLIEST!!!!
A substance decays 35% each day. After 8 days, there are 8 milligrams of the substance remaining. How many milligrams were there initially?

251 milligrams

126 milligrams

45 miligrams

3 milligrams

Answers

126 I hope that this is correct answer

Evaluate for X = 2 and y = -3.2x - 3y + x2​

Answers

Answer:

15.6

Step-by-step explanation:

[tex]x - 3y + x^2\\2 + 9.6 + 4\\= 15.6[/tex]

What is angle hgf. If angle egf is 110 and angle hge is 3x+11 and angle hgf is 16x+4

Answers

Step-by-step explanation:

The Angle Addition Postulate de fusteer Key. Date ... 99° and MZLMF = 36º. Find m2LMN. 6) Find mZWDC if IZEDC = 145° and mZEDW= 61°. N of w. C ... 11) mZHGF = 16x + 4, m EGF = 110°,. 12) mZVUT = 175° ... a H, 16X+4=110 + 3x +11

PLEASE HELP OR I WON'T GET MY CREDITS!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

[tex]y = \frac14 x - 4[/tex]

Step-by-step explanation:

The slope is 1/4 since y increases 1 when x increases by 4 (you divide deltaY by deltaX).

Then, to make it go through (0,-4) you subtract -4.

At a store closing, a universal discount rate is applied to all items. the table shows the price for three items.

Part B: To the nearest penny, what is the value of x?

A. $17.17

B. $28.62

C. $0.97

D. $10.80

Answers

Answer:

Step-by-step explanation:

the anser to this will b e c

Answer:

c

Step-by-step explanation:

The answer is c

50% of the number is 2,
the number is ??

Answers

Answer:

4

Step-by-step explanation:

just multiply it by 2 lol

Answer: 4

Step-by-step explanation:

Change the percent to a decimal by taking it out of 100. Then do 2/50%

50% = 50/100 = 1/2

2/0.5 = 4

Devon forgets to pay his credit card bill for three months. Which of the following statements is TRUE? *

1. A Late Payment fee will not be charged to his account.
2. A Balance Transfer fee will be charged to his account.
3. His A.P.R. (interest rate) will rise to 30.24% until he pays back the amount he owes.
4. His A.P.R. (interest rate) will rise to 30.24% and stay there until he makes six consecutive minimum payments .

Answers

The answer is 3. His A.P.R. (interest rate) will rise to 30.24% until he pays back the amount he owes.

A theater is selling tickets for a performance. Mr. Smith purchased 8 senior tickets and 5 child tickets for $136 for his friends and family. Mr. Jackson purchased 4 senior tickets and 6 child tickets for $96. What is the price of each ticket?

Answers

Answer:

for the seniors, the answer is $12, and for the children, the answer is 8.

Step-by-step explanation:

HELP!!!!!!
Which of the following expressions can be used to calculate the circumference of a circle?

Answers

Answer:

Circumference of the Circle is 2π(radius)= 2πr

Answer:

I would say it is 2 pie r

Step-by-step explanation:

(2, 1), (4, 3). (6, 5), (8,7)

Answers

Answer:

(1,  2), (3,  4), (5, 6), (8, 7)

Step-by-step explanation:As we can observe from the answers the representation is about the pair of points. We can sort it out by excluding the wrong options.

What's the slope of -1,0 and 3,-2

Answers

Answer:

-2/4

Step-by-step explanation:

What's the slope of -1,0 and 3,-2

Answer:

-0.5

Step-by-step explanation:

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