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
PtichkaEL [24]
3 years ago
8

Solve using the substitution method -7x+y =42 and 5x+13y =66

Mathematics
1 answer:
leva [86]3 years ago
5 0
-7x+y=42
y=42+7x 

5x+13y=66
Substitute for y (meaning put 42+7x into the equation above instead of y because they are equal - see second line of my answer above)

5x+13[42+7x]  = 66
5x +546 = 66
5x=66-546
5x=-480
x=-480/5
x=-96

You might be interested in
Answer this question is it <br> A <br> B <br> C or<br> D
jasenka [17]

Answer:

B and D (

Step-by-step explanation:

1*2/3*2=2/6

1*3/3*3=3/9

5 0
3 years ago
A spherical tank has a radius of 6 yards. It is filled with a liquid that costs $7.15 per cubic yard.
scoray [572]
4πr³/3=V

288π=V

288πx7.15=$6,465.89
5 0
3 years ago
Read 2 more answers
Use the percent bar model to find the missing percent
Ne4ueva [31]

A percentage is a way to describe a part of a whole. The missing percent on the bar model is equal to 12.5%.

<h3>What are Percentages?</h3>

A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.

To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.

On the percent bar model, above the missing percentage, the fraction is given as 1/8.

Now, the given fraction 1/8 in the form of percentage can be written as,

1/8

= 1/8 × 100%

= 0.125 × 100%

= 12.5%

Hence, the missing percent on the bar model is equal to 12.5%.

Learn more about Percentages here:

brainly.com/question/6972121

#SPJ1

3 0
2 years ago
PLease help if u can✊​
Vaselesa [24]

Answer:

5 hours

Step-by-step explanation:

75 + 55x = 350

75 - 75 + 55x = 350 - 75

55x = 275

\frac{55x}{55} = \frac{275}{55}

x = 5

4 0
3 years ago
18y^8x^4w^6 and 30y^7w^3
djyliett [7]

Answer:

10

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • How to find three consecutive odd numbers whose product is 2145?
    13·1 answer
  • Please help me, I don't know this one.
    5·2 answers
  • What is 3(9-3r)= simplifyed
    13·2 answers
  • <img src="https://tex.z-dn.net/?f=%20%20%5Csqrt%7B8x%20%2B%2012%20%2B%204%20%3D%2010%7D%20" id="TexFormula1" title=" \sqrt{8x +
    10·1 answer
  • Circle the fraction equal to 0.1%
    10·1 answer
  • Y = - x + 4 y = 2x - 8​
    13·2 answers
  • Solve the equation. <br><br> 2.2= z - 1.1 <br> z=?
    12·1 answer
  • Is 4 to 7 the same as 7 to 4? Explain why or why not.
    9·1 answer
  • Please help if you can please
    12·1 answer
  • WILL GIVE EXTRA POINTS FOR ANSWER ⭐️⭐️!! PLEASE EXPLAIN IF POSSIBLE
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!