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Vilka [71]
3 years ago
11

Please help !!! 3x+8y x = 7 y = -2

Mathematics
1 answer:
Vinil7 [7]3 years ago
4 0

Answer: 5

Step-by-step explanation:

you do each variable individually first, 3(7)=21, 8(-2) is -16, then you add them, 21-16=5 so that is your answer

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If 12 baseballs weigh 40 ounces, how much will 30 baseballs weigh
svet-max [94.6K]

Answer:

First you have to divide 12 by 40 to get 0.3 becuase 0.3x40=12 so each baseball weighs 0.3 ounces. Then you have to 30x0.3 to get 90 so your answer would be 90 pounds for 30 baseballs.

6 0
3 years ago
A) Solve x+x+x=54
olasank [31]

a) x= 54÷3 = 18

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3 0
4 years ago
Ari’s chickens eat their pellets at a constant rate throughout each day.
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4 0
3 years ago
Analyze the reflectional symmetry of the regular polygons. The square has -fold reflectional symmetry. The regular octagon has -
postnew [5]

Answer:

The square has 4-fold reflectional symmetry. The regular octagon has 8-fold symmetry.

Step-by-step explanation:

For a square,

There are two lines of symmetry along two diagonals and

two lines of symmetry along midpoints of two pairs of opposite sides.

Therefore, there are 4 lines of reflectional symmetry in total.

For a regular octagon,

There are four lines of symmetry along four diagonals and

four lines of symmetry along midpoints of four pairs of opposite sides.

Therefore, there are 8 lines of reflectional symmetry in total.

8 0
3 years ago
Jack left a tip of $5.75 for his waiter. If this represents 20% of his meal, what was the cost, in dollars, of Jack’s meal witho
Readme [11.4K]

Answer:

Step-by-step explanation:

This is a commission problem. Here is the formula:

P x R

= 5.75 x 0.20

= $1.15

<em>Jack's tip was $1.15. :D</em>

Key: P = Original Price R = Commission Rate

7 0
3 years ago
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