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Ede4ka [16]
3 years ago
15

Evaluate the expression when x=3 and y=-6 7y-x

Mathematics
2 answers:
Alenkasestr [34]3 years ago
8 0
7(-6) - 3
-42 -3
-45
Your answer is -45
stira [4]3 years ago
8 0
7y-x
=7(-6)-3
=-42-3
=-45
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Can someone help me please? i'm not sure if 4 is right and i don't understand how to do 3
PtichkaEL [24]
3 Is B. The formula for finding the area of a circle is A= r(to the second power) times Pi. The radius is 6, so you must do 6 to the second power which is 6 times 6. That is 36. Your answer will be 36 pi. 
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IS THIS CORRECT?! I HAVE A BACK SIDE TOO, IF ANYTHING IS WRONG PLS PLS LMK!!
Fudgin [204]

The only error you made is on problem 3. Everything else is correct. Nice work.

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

Here is how to solve problem 3

Plug x = 1 into the equation and solve for y

-3x + y = 1

-3*1 + y = 1 ... replace x with 1

-3 + y = 1

y - 3 = 1

y - 3 + 3 = 1 + 3 .... add 3 to both sides

y = 4

<h3>The answer is 4</h3>

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

Verifying the answer:

Plug (x,y) = (1,4) into the equation. Both sides should be the same number after simplifying both sides.

-3x + y = 1

-3*1 + 4 = 1 ..... replace x with 1; replace y with 4

-3 + 4 = 1

1 = 1

The answer is confirmed.

If you were to graph -3x + y = 1, which is equivalent to y = 3x+1, you'll find that the point (1,4) is on this line.

4 0
3 years ago
What does this mean? I don’t understand.
Nutka1998 [239]

ninety four means $94. 36/100 means $0.36. when you put these together you get $94.36

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Find the final price of a $849.99 laptop with 6% sales tax
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3 years ago
Select the reason why these triangles are similar. if they are not select no similar
lana66690 [7]

Answer:

SAS

Step-by-step explanation:

well there exactly ths same you just add what ever inside and subtract forn 180 which is an angle

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