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3 years ago

Solve the sum .Help me to do this sum

Mathematics

1 answer:

qwelly [4]3 years ago

6 0

Answer:

24/5 is the answer......

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Evaluate the expression 5(8y+3r-5z) if r=3,y=5/8,and z=2

snow_lady [41]

First you plug in the missing values
5(8×5/8+3×3-5×2) = 20

3 0

3 years ago

BRAINLIEST<br>There are infinitely many lines with a slope of 42?<br><br>True or False

jek_recluse [69]

Answer:

True

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Y=5-1/2x x=-2,0,2,4

telo118 [61]

Answer:

y=6,5,4,3 are value for y

6 0

4 years ago

Question is shown below.

Andrei [34K]

ANSWER

D. 4 minutes 40 seconds

EXPLANATION

The given data set showing the number of seconds of each song the playlist is:

283,204,198,229,173,230,168,236,215,204

Let the length of the 11th song be x.

Because he wants the mean to be 3 minutes 40 seconds, which is equal to 220 seconds, we write and solve the following equation for x.

$\frac{283 + 204 + 198 + 229 + 173 + 230 + 168 + 236 + 215 + 204 + x}{11} = 220$

$\frac{2140 + x}{11} = 220$

$2140 + x = 2420$

$x = 2420 - 2140$

$x = 280$

We convert 280 seconds to minutes.

$\frac{280}{60} = 4 \frac{2}{3} = 4mins : 40 sec$

The correct choice is D

3 0

4 years ago

Problem 5. A skating rink in the shape shown has an area of

nexus9112 [7]

Answer:

$P=\dfrac{\pi r^2+2800}{r} $ ft$

Step-by-step explanation:

Let the length of the rectangular part =l

The width will be equal to the diameter of the semicircles.

Area of the Skating Rink= $2(\frac{\pi r^2}{2})+(lX2r)$

Therefore:

$\pi r^2+2lr=2800\\2lr=2800-\pi r^2\\$Divide both sides by 2r\\l=\dfrac{2800-\pi r^2}{2r}$

Perimeter of the Shape =Perimeter of two Semicircles + 2l

$=2\pi r+2\left(\dfrac{2800-\pi r^2}{2r}\right)\\=2\pi r+\dfrac{2800-\pi r^2}{r}\\=\dfrac{2\pi r^2+2800-\pi r^2}{r}\\=\dfrac{\pi r^2+2800}{r}$

The perimeter of the rink is given as:

$P=\dfrac{\pi r^2+2800}{r} $ ft$

4 0

3 years ago

Solve the sum .Help me to do this sum​

Solve the sum .Help me to do this sum