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4 years ago

Circumference of a semi-circle with diameter 30

Mathematics

1 answer:

PolarNik [594]4 years ago

7 0

0.5 * 3.14 * 30 = 47.1

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Solve by substitution<br>x+3y=5 <br>-2x-4=-5 <br>

likoan [24]

Answer:

x = 1/2 , y = 3/2

Step-by-step explanation:

Solve the following system:

{3 y + x = 5

-2 x - 4 = -5

Hint: | Choose an equation and a variable to solve for.

In the second equation, look to solve for x:

{3 y + x = 5

-2 x - 4 = -5

Hint: | Isolate terms with x to the left hand side.

Add 4 to both sides:

{3 y + x = 5

-2 x = -1

Hint: | Solve for x.

Divide both sides by -2:

{3 y + x = 5

x = 1/2

Hint: | Perform a substitution.

Substitute x = 1/2 into the first equation:

{3 y + 1/2 = 5

x = 1/2

Hint: | Choose an equation and a variable to solve for.

In the first equation, look to solve for y:

{3 y + 1/2 = 5

x = 1/2

Hint: | Isolate terms with y to the left hand side.

Subtract 1/2 from both sides:

{3 y = 9/2

x = 1/2

Hint: | Solve for y.

Divide both sides by 3:

{y = 3/2

x = 1/2

Hint: | Sort results.

Collect results in alphabetical order:

Answer:{x = 1/2 , y = 3/2

3 0

3 years ago

Lucy has a total of 25 dimes and quarters that add up to 2.80 which graph represents the number of dimes and quarters lucy has?

Talja [164]

We need to be able to see the graphs, can you add a picture? If you do have one, than sorry, but it won’t load.

6 0

3 years ago

Read 2 more answers

What's 4 2/3 times 2

Hoochie [10]

Four and two thirds multiplied by two is:
4*2=8
2/3 * 2 = 4/3 or one and one third
so the answer to your question is:
9 1/3

4 0

3 years ago

Read 2 more answers

A cashier worked an 8-hour day, and earned $58.00. The double number line shows the amount she earned for working different numb

pav-90 [236]

Answer:

$7.25=1hr $21.75=3hrs

Step-by-step explanation:

$58=8hrs

58/8=7.25

$7.25=1hr

7.25x3=21.75

$21.75=3hrs

Hope this helps :)

8 0

2 years ago

3. A catering service paid $520 for 10 center pieces and 60 glasses. The guest list grew, requiring an

ELEN [110]

Center piece was $40
Glasses were $2
I used the elimination method. I multiplied everything in the equation that represents the second order by five and subtracted it from the first orders equation. I then solved for y and got that each glass was $2. I then plugged the 2 back into the original equation to find that a centerpiece was $40.
(Attached)

8 0

3 years ago