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4 years ago

Help me solve this pleaseee

Mathematics

1 answer:

Drupady [299]4 years ago

3 0

Since they are equal to 90 degrees. (complimentary angles)

6x-11+7x+10= 90

Combine like terms.

13x-1= 90

Add one to both sides.

13x= 91

x= 7

Plug that into the b.

7(7)+10

49+10

59

I hope this helps!
~kaikers

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3 years ago

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melisa1 [442]

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3 years ago

A department store has daily mean sales of $28,372.72. The standard deviation of sales is $2000. On Tuesday, the store sold

DiKsa [7]

Answer:

Tuesday z-score was 3.26.

Tuesday was a significantly good day.

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.

A score is said to be significantly high if it has a z-score higher than 1.64, that is, it is at least in the 95th percentile.

In this problem, we have that:

$\mu = 28372.72, \sigma = 2000$

On Tuesday, the store sold $34,885.21 worth of goods. Find Tuesday's z-score.

This is Z when $X = 34885.21$

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

$Z = \frac{34885.21 - 28372.72}{2000}$

$Z = 3.26$

Tuesday z-score was 3.26.

Was Tuesday a significantly good day?

A z-score of 3.26 has a pvalue of 0.9994. So only 1-0.9994 = 0.0006 = 0.06% of the day are better than Tuesday.

So yes, Tuesday was a significantly good day.

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3 years ago

How many 150 mL glasses can I fill with 5 bottles of soft drinks each hold 1.2 L

Liono4ka [1.6K]

Answer:

<h2>you can fill 40 (150ml) glasses with 5 bottles of soft drinks</h2>

Basic fact:

there are 1000 ml in a litre

Step-by-step explanation:

let us do

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now let's turn 6 litres in ml

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now we need to do

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instead of doing such big numbers, lets do

600/15

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2 years ago

Read 2 more answers