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2 years ago

Solve 10q + 15n = 49 for 'q'. show steps please

Mathematics

1 answer:

klasskru [66]2 years ago

3 0

$\displaystyle 10q + 15n=49\quad \Big|-15n\\\\10q=49-15n\quad \Big|:10\\\\q= \frac{49-15n}{10}$

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Look below :)<br> Everything is underneath, ty. Just need an answer by Wednesday

mamaluj [8]

Answer:

Step-by-step explanation:

$\dfrac{3}{6}=\dfrac{9}{18}=\dfrac{27}{54}$

$\dfrac{3*3}{6*3}=\dfrac{9}{18}\\\\\\\dfrac{3*9}{6*9}=\dfrac{27}{54}$

6 0

3 years ago

In a recent contest, the mean score was 210 and the standard deviation was 25. a) Find the z-score of John who scored 190 b) Fin

denpristay [2]

Answer:

a) $Z = -0.8$

b) $Z = 2.4$

c) Mary's score was 241.25.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 210, \sigma = 25$

a) Find the z-score of John who scored 190

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{190 - 210}{25}$

$Z = -0.8$

b) Find the z-score of Bill who scored 270

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{270 - 210}{25}$

$Z = 2.4$

c) If Mary had a score of 1.25, what was Mary’s score?

$Z = \frac{X - \mu}{\sigma}$

$1.25 = \frac{X - 210}{25}$

$X - 210 = 25*1.25$

$X = 241.25$

Mary's score was 241.25.

3 0

2 years ago

Read 2 more answers

A town has accumulated 2 inches of snow, and the snow depth in increasing by 6 inches every hour. A nearby town has accumulated

earnstyle [38]

Town A starts with 2in and has a rate of accumulation of 6in every 1 hour
Town B starts with 9in and has a rate of accumulation of 3in every 1 hour

If X is number of hours then:

2+ 6X= 9+3X
6x-3x=9-2
3x=7
X=7/3 is about 2 hours

7 0

3 years ago

A 10 ounce container if milk contains 200 calories. how many calories does each ounce of milk contain?

kaheart [24]

The answer that is correct is 20 so there you go

5 0

3 years ago

What is the Area of this shape?

Inessa05 [86]

14 * 12 = 168

(12*8) / 2 = 48

216 cm ^2