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
pshichka [43]
3 years ago
11

I need help with all of them and if you can't help with all of them just answer one of them please. Look at the picture

Mathematics
1 answer:
likoan [24]3 years ago
5 0
All you have to do is substitute the y value from the 1st equation into the second equation and solve...

a) y= 2-x
5x + 4y = 5

Substitute (2-x) into the second equation anywhere there is a y...

5x + 4y = 5
5x + 4(2-x) = 5

Now solve

5x + 8 - 4x = 5
5x - 4x + 8 = 5
x + 8 = 5
x = -3

Now that you have a solution for x, substitute -3 into either of the original equations anywhere there is an x then solve for y...

y = 2 - x
y = 2 - (-3)
y = 2+3 = 5

You solved for x and got -3 and solved for y and got 5, so your solution set is
(-3, 5).

Now check it by substituting both numbers into one of the original equations and you should have a true statement if it is correct...

y = 2 - x
5 = 2 - (-3)
5 = 2+3
5 = 5

True statement... it checks!


note* during the check, if the equation would have worked out to something like 2 = 5, then that is a false statement therefore the solution set would be wrong and you'd have to go back and find the mistake.
You might be interested in
At the beginning to the year, Ms. Mitchell had 185 pencils Ms. Mitchell now has 60% of the pencils she started with, how many pe
REY [17]

Answer:

111

Step-by-step explanation:

you’d multiply

3 0
3 years ago
Heather has a bag with 8 marbles, 8 tennis balls, 4 apples, and 5 books. What is the ratio of books to tennis balls? 4:7, 8:8, 8
mafiozo [28]

Answer:

The ratio is 5:8.

Step-by-step explanation:

Since we are looking for books and tennis balls, we have to look at how many there are. There are 5 books and 8 tennis balls. We're looking for the ratio of books to tennis balls, so it has to be in that order. 5:8

I hope this helped! :-)

3 0
3 years ago
I need an answer...............................
navik [9.2K]

Answer:

8 i think

Step-by-step explanation:

4 0
3 years ago
maria wanted to invest $10,000 at the bank. she invested part of her money in a cd account paying 2.1% simple interest and inves
tangare [24]

Answer:I = ?, P = $500, r = 6%, t = 3 years

Step-by-step explanation:

6 0
3 years ago
Given the function f(x)=4x^8+7x^7+1x^6+1 What is the value of f(−2)?
qwelly [4]
<span> f(x)=4x^8+7x^7+1x^6+
</span>∴<span> f(-2)=4(-2)^8+7(-2)^7+1(-2)^6+1
</span>∴ <span>f(-2)=(4x256) + (7x-128) + (1x64) +1
</span>∴ <span>f(-2)=1024 - 896 + 64 +1
</span>∴ <span>f(-2)= 193</span>
7 0
3 years ago
Other questions:
  • 2593 ÷6 use compatible numbers to do estimate
    14·2 answers
  • Can Someone Please Help me, Show Work too
    14·1 answer
  • 1hole minus two thirds
    8·1 answer
  • The price of a office chair was $86.00. the tax rate wad 6%.
    6·1 answer
  • Can someone please help me ?!! I cannot figure it out . I am confused
    8·1 answer
  • The price of a watch was increased by 7% to 1350. what was the price before increase?
    6·2 answers
  • Can you guys figure it out ??
    15·1 answer
  • Add the following<br> -5+(-7)+9+(-3)<br> - 5+(-7)+9+(-3)=(Simplify your answer.)
    6·1 answer
  • Write an expression for each of the following:
    15·2 answers
  • Solve the inequality. then, graph the solution. <br><br> fill in the boxes to solve the inequality .
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!