1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lera25 [3.4K]
3 years ago
9

If 7x+5=-2, find the value of 8x?

Mathematics
1 answer:
Mama L [17]3 years ago
5 0
7x + 5 = -2
7x = -2 - 5 = -7
7x + x = -7 + x
8x = -7 + x
You might be interested in
Simplify each radical
const2013 [10]

Answer:

AECG

Step-by-step explanation:

1

sqrt(49) = 7

sqrt(a^2) = a

sqrt(b^2) = b

For every two variables you can take one out from under the root sign and thorough the other one away.

Answer: E

2

sqrt(36) = 6

sqrt(a^2) = a  See comment for 1.

b must be left where it is. There is only 1 of them.

6asqrt(b)

Answer: A

3. sqrt(25) = 5

sqrt(b^2) = b

a must be left alone.  There's only 1 of them.

5b sqrt(a)

answer: C

4

sqrt(81 a b)

sqrt(81) = 9

The variables must be left alone. There's only1 of them

9 sqrt(ab)

Answer G

8 0
2 years ago
Seth is trying to find the unit price for a package of blank compact discs on sale at 10 for $5.49. Find his mistake and correct
uysha [10]
If you do not mind me asking, what did Seth write? Us helpers cannot answer it if we do not have the full question. I apologize if this seems rude.
6 0
3 years ago
Read 2 more answers
Is y=7.5x a proportional relationship and why
DerKrebs [107]
Direct Proportion functions look like this:

y=kx

'k' is the constant of proportionality and in this case its 7.5 or 15/2.

--------------------------------------------

When x=1, y=7.5
When x=2, y=15
When x=3, y=22.5

Therefore y is directly proportional to x.

--------------------------------------

DIRECT PROPORTION EXPLAINED:

Say a football costs £7.50. If you buy one football you'll have to pay out £7.50, but if you you buy two footballs you'll have to pay out £15.00. Therefore the cost of the football(s) is directly proportional to the amount of footballs you buy. C=cost, f=football(s) and C<span>∝f, therefore C=kf, but as k=7.5, C=7.5f.

INVERSE PROPORTION EXPLAINED:

If it were to take 8 hours for one bricklayer to set up a wall, how long would it take for two bricklayers to set up a wall? The answer in this case would be 4 hours.

T=time to set up a wall
b=bricklayer(s)

Therefore T</span><span>∝1/b, and T=k/b. In this case k=8 so T=8/b.

When b=1, T=8.
When b=2, T=4.

We'd say that the time it would take for bricklayers to set up a wall would be inversely proportional to the amount of bricklayers available.</span>
4 0
3 years ago
Select all names that apply.<br><br><br> 121<br> 121
Naily [24]

I don't understand the question

8 0
3 years ago
Okay so I am confused about a few questions so I'll ask a few.
Otrada [13]
The vertex’s coordinates are (-1,4)
6 0
3 years ago
Other questions:
  • Does anyone know what -8.75x+14=-5.25-3.5 is in math
    12·2 answers
  • What is the range of the given function?
    5·1 answer
  • Razi is filling bags with party favors for his birthday party. The table to the right shows the number of bags he still needs to
    7·2 answers
  • On a survey, 185 people out of 420 state that they like dogs. What percent is this?
    11·1 answer
  • What would be the answer to this question
    6·2 answers
  • The area of a circle is 100pi m2. What is the circumference, in meters? Express your
    10·1 answer
  • What is the solution to the following system of equation y=6x11 -2x3y=-7
    8·1 answer
  • HELP! I don’t understandddd.
    7·1 answer
  • Pls help question is on picture
    7·2 answers
  • Solve the inequality:<br> p/-4 - 1 &gt; 1
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!