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JulijaS [17]
3 years ago
7

How do I find the answer to the problem -1/2=y-1

Mathematics
1 answer:
Ann [662]3 years ago
4 0

Answer:

y=1/2

Step-by-step explanation:

y-1=-1/2 Switch sides

y-1+1=-1/2+1 Add 1 to both sides

y=1/2 Simplify

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A. How long does the piece of wire need to be to make the shape? Explain.
Misha Larkins [42]

A. The wire needs to be 138.226 cm long but already 34.5565 cm of the circle has been covered.

B. To determine the length of the wire needed, we subtract a quarter of the circles circumference from its whole circumference.

Step-by-step explanation:

Step 1:

The circumference of a circle is obtained by multiplying the radius with 2π.

The circumference of a circle = 2 \pi r.

Here the radius of the circle is 22 cm but already a quarter of the circumference has been covered with wire.

Step 2:

So to determine the length of the wire needed, we subtract a quarter of the circles circumference from its whole circumference.

So the circumference of the circle = 2(3.1415)(22) = 138.226 cm.

\frac{3}{4} (138.226) = 103.6695 cm and \frac{1}{4}(138.226) = 34.5565 cm.

So the wire needs to be 138.226 cm long but already 34.5565 cm of the circle has been covered. An additional 103.6695 cm of wire is needed to cover the remaining circle.

7 0
3 years ago
Share a reward of $140 in a ratio of 2:5
storchak [24]
So first we divide 140 by 7 because our ratio is a total of 7 dollars to get 20
So we multiply both sides of the ratio by 20 to get a ratio of 40:100
We can check our answer and it is right because 100+40=140
3 0
3 years ago
5. Mark's brother is five years older than Mark.
AleksAgata [21]

Answer:

9

Step-by-step explanation:

Let's say Mark is M and his brother is B.

M+5=B

M+B=23

Now we can solve using subsitution.

M+M+5=23

(Subtract 5 from both sides)

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Hope this helped!

8 0
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Crazy boy [7]

Answer:

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Step-by-step explanation:

7 0
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Solve this with the explanation please
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  1. yes,
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Hope it helps

8 0
2 years ago
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