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
tester [92]
2 years ago
8

— 4х + 7y = 20 у = 3х + 15

Mathematics
1 answer:
Angelina_Jolie [31]2 years ago
6 0

Answer:

x=-5

Step-by-step explanation:

-4x+7(3x+15)=20\\ -4x+21x+105=20\\ 17x+105=20\\ 17x=20-105\\ 17x=-85\\ x=-5

You might be interested in
If copies cost .08 per copy but you buy a fuscount card for 7.50 and the copies are .05 how many copies will make it worth the d
timurjin [86]

Answer:

<u>The number of copies that will make it worth the discount card is 250.</u>

Step-by-step explanation:

1. Let's review the information provided to answer the question correctly:

Cost per copy without discount = US$ 0.08

Cost per copy with discount = US$ 0.05

Cost of discount card = US$ 7.50

2. How many copies will make it worth the discount card?

For finding out this number of copies, we will use the following equation:

x = Number of copies that will make it worth the discount card

0.08x = 0.05x + 7.50

0.03x = 7.50 (Like terms)

3x = 750 (Multiplying by 100 at both sides)

x = 250 (Dividing by 3 at both sides)

<u>The number of copies that will make it worth the discount card is 250.</u>

Note: Same answer to question 14127203, answered by me today.

7 0
3 years ago
Work out 18/36 - 2/6, give your answer in its simplest form​
svp [43]
The answer in simplest form would be 1/6
4 0
3 years ago
Find the area of the shape shown below.
disa [49]

Answer:  31.5 square units

Explanation:

The area of the rectangle is length*width = 7*3 = 21 square units

The area of the triangle is 0.5*base*height = 0.5*7*3 = 10.5 square units

The combined area is 21+10.5 = 31.5 square units

8 0
3 years ago
Nolan draw a right triangle. how many acute angles did he draw
mamaluj [8]
He drew one acute angle
8 0
3 years ago
-2log5 7x=2<br><br> the 5 is small please help me
RSB [31]
-2log_5 7x = log_5 2

log_5[1/(7x)^2] = log_5 2

log_5(1/49x^2) = log_5 2

log_5(1 - 49x^2) = log_5 2

1 - 49x^2 = 2

You finish.

3 0
2 years ago
Other questions:
  • Explain how the value of 7 in 327,902 will change if you move it to the tens place
    11·1 answer
  • How do you solve <br>|3x|=18
    5·2 answers
  • 14. Why is estimation an important tool
    9·1 answer
  • What algebraic expression is used below. 5+3(2x-7)=5+6-21
    6·1 answer
  • A person wishes to mix coffee worth ​$9 per lb with coffee worth ​$3 per lbto get 240 lbsof a mixture worth $5 per lbHow many po
    9·1 answer
  • 19+7÷2 x 6+1=1 We’re to put brackets to make it =1
    9·1 answer
  • Please help and explain how to do this
    13·1 answer
  • Algebra find the unknown digit to make each statement true 2.48&gt;2.4 1&gt;2.463
    9·1 answer
  • How many tiles will they need to make
    8·2 answers
  • Guys help me solve this plzzz:(((;;(;;;((;
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!