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3 years ago

Sasha spent half of her allowance

Mathematics

1 answer:

Nikolay [14]3 years ago

8 0

Answer:

$18 was her allowance

Step-by-step explanation:

do it backwards

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The school orchestra has 20 woodwinds, 20 brass instruments, 45 percussionists and 15 strings. Select the portion of the instrum

Alona [7]

Find total instruments:

20+20+45+15 = 100

20 are brass

The portion would be number of brass over total:

20/100 which reduces to 1/5 are brass

6 0

4 years ago

Read 2 more answers

The amount dispensed by a soft-drink dispensing machine has a normal distribution with mean μ and standard deviation 0.191 ounce

nirvana33 [79]

Answer:

The value of mean is $\mu = 15.64$

Step-by-step explanation:

The normal distribution of the soft-drink dispensing machine can be stated statistically like

$X$ ~ $N (\mu ,0.191^2)$

The standard form representation is

$P(X$

Now we need to obtain $\mu$ in such a way that

$P(X>16) = 0.01$

In standard form

Since

$P(Z>16 -\frac{\mu}{0.191} ) = 0.03$

This means

$P(Z$

Now looking at the z-table for probability of 0.99 we obtain 1.88

i.e

$16 - \frac{\mu}{0.191} = 1.88$

Making $\mu\ the \ subject$

$16 - \mu = 1.88 *0.191$

$\mu = 16 -(1.88*0.191)$

$=15.64$

8 0

3 years ago

Jk/j+k when j = 6 and k = 12

arlik [135]

Answer: I'm pretty sure it's 15

Step-by-step explanation:

18/6+12

3+12

3 0

3 years ago

Are those two expression equivalent when x=10 <br> 5(3x+8)<br> 8(x+8

My name is Ann [436]

No, the first choice equals 190 and the second 144.

6 0

3 years ago

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How many flowers spaced every 6in are needed to surround a crcular garden with a 125ft radius?use 3.14 for pi

pychu [463]

What you would do is3.14*r^2
3.14*125*125 which is 49062.5ft^2
if you need to know how many each 6 inch then you would convert ft to inches which would be 588750in then divide it by 6 which will be 98125 flowers are needed to surround a cicular garden

7 0

3 years ago