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Andrej [43]
3 years ago
11

3 math problem please show step by step

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
6 0
Number 1
- Multiply the first one by negative one so the x’s are opposites. (-5x-y=12)
- Simplify them
-5x-y=12
5x-7y=4
-8y=16
y=-2
-Fill in y to one of them to find x (x=-2)

Number 2
-Multiply the bottom one by 4 so it is opposite to the first one (-36x-4y=-120)
-Simplify
-5x+4y=-3
-36x-4y=-120
-41x=-123
x=3
-Fill x into one of the problems to find y (y=3)

Number 3
-Multiply the bottom one by -2 to make it opposite (2x-6y=-20)
-Simplify
-9x+6y=27
2x-6y=-20
-7x=7
x=-1
-Fill into one of the equations to get y (y=3)
babymother [125]3 years ago
4 0
The correct answe to tht wits is my
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Jestina has A apples, she gave 5 to her sister, enter an expression to represent the number of apples jestina has now!! (show wo
AnnZ [28]

Answer: A-5

Step-by-step explanation:

Jestina has A apples

she gave 5 away

so she has 5 fewer apples than she had before

so A-5 is the amount of apples she has now

3 0
3 years ago
Please pls help lolll :/
Sloan [31]
The anwser is 3.14 X 9X9 = the anwser is 254.47 or rounded it can be 254.4 or 254.5 FORUMLA: I used PI X R squared .
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3 years ago
Of the 800 sweaters at a certain store, 150 are red. How many of the red sweaters at the store are made of pure wool? (1) 320 of
vitfil [10]

Answer:

Statement (2) ALONE is sufficient, but statement (1) ALONE is not sufficient.

Step-by-step explanation:

Judging by the first sentence, there are 800 sweaters, 150 of which are red. Hence 800 - 150 = 650 sweaters are not red.

Statement (1) mentions that 320 of the sweaters at the store are neither red nor made of pure wool. This implies that of the remaining 650 non-red sweaters, 320 of them are not made of pure wool. It tells us then that there are 650 - 320 = 330 sweaters that are not red and that are not pure wool. So, it does not give information about red sweaters at all, whether pure wool or not.

Statement (2) says 100 of the red sweaters at the store are not made of pure wool. This means out of all 150 red sweaters, 100 of them are not made of pure wool. Then we have that 150 - 100 = 50 red sweaters are made of pure wool. This is the response to the question asked.

Hence, we see that statement (2) alone is enough, while statement (1) alone is not.

8 0
3 years ago
What’s an equation that equals to 7
Airida [17]

There are many equations that equal 7 but here are a few

3+4=7

15-8=7

3.5*2=7

49/7=7

-35/-5=7

3 0
3 years ago
Read 2 more answers
Find the value of this expression if x= 9. x square + 6 over x-6.
torisob [31]
Hold on, does the equation look like this? (x^2+6)/x-6? Because if so then you'd substitute nine for x first. Then you'd multiply nine by itself getting eighty-one, after that add six to get eighty-seven. substitute nine for x one more and subtract six. take eighty-seven divided by three to get an answer of twenty-nine. But if the equation is saying the square of nine aside from nine squared then you'd have an entirely different problem. That one would look similar to *square symbol*(9)+6/9-6
 , You'd solve this by finding the square of nine which is three then you'd add six and get a numerator of nine. Then you go about the bottom the same as you would have in the first equation, subtract six from nine giving you a denominator of three so you now have nine over three which simplified is three.
 
The two answers are 29 or 3 depending on the equation.
6 0
3 years ago
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