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kozerog [31]
2 years ago
8

If x=7 and y=−3, evaluate the following expression:3x−y2​

Mathematics
2 answers:
Simora [160]2 years ago
8 0
3(7)-(3)2 sub in the numbers
21-6=15
the answer is 15
Hoochie [10]2 years ago
7 0

Answer:

27

Step-by-step explanation:

3x−y2​= ? if x= 7 & y= -3

Step 1 insert the numbers where they go:

3(7)-(-3)2=

Step 2 the two negatives become a positive:

3(7)+(3)2=

Step 3 multiply:

21+6=

Step 4 add:

27

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belka [17]

Answer:

10 yards 2 inches

Step-by-step explanation:

15 yd 5 in - 5 yd 3 in =

10 yards and 2 inches

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3 years ago
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Variable y varies directly with variable x, and y = 5 when x = 8.
qaws [65]
Y = kx

Plug in what we know:

5 = k(8)

5 = 8k

Divide 8 to both sides:

k = 0.625

Plug this back into the equation along with y = 15:

y = kx

15 = 0.625x

Divide 0.625 to both sides:

x = 24
4 0
3 years ago
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What is the rectangle's height and base?
HACTEHA [7]

Answer:

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6 0
2 years ago
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At the beginning of the week, you have $42 in your savings account. During the week, you deposit $25 and withdraw $36. How much
Natalija [7]

Answer: you have $31 at the end of the week

Step-by-step explanation:

First, let's put this problem into an algebraic expression. We started off with $42. We then added $25 and took out $36 during the week. The expression for this problem is

42

+

25

−

36

.

Next, add 42 and 25 together to get

67

. We now have

67

−

36

.

Finally, subtract 36 from 67 to get

31

, our answer.

5 0
2 years ago
John eats 2/5 of an apple pie and then jia eats a third of what left. what fraction of the pie is left after both of them eat?​
Fudgin [204]

Answer:

Step-by-step explanation:

1-1-1-1-1 = 5 apple pies

Divide the apple pie into 5 pieces

Then you take away 2 out of the 5 pieces = 3 pies left

Then you take one pie (1/3rd) from the 3 pies left = 2

Answer is 2

8 0
2 years ago
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