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3 years ago

8

There are 26 students in an algebra class. The number of girls in the class is one less than twice the number of boys. How many

boys are in the class? Show your work!!!!!!!

1 answer:

bonufazy [111]3 years ago

5 0

26=2b+b-1 ----> 27=3b -----> b=9 boys are in the class

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Tan (angle B) using an exact expression in trigonometric ratios in right triangles

goblinko [34]

The value of the tangent of an angle is the ratio (opposite side) / (adjacent side).

Here you see that the opposite side (opposite to Angle B) is of length 5 and the adj. side has length 12.

Thus, the tan of Angle B is 5/12. (answer)

4 0

3 years ago

Based on historical data, your manager believes that 40% of the company's orders come from first-time customers. A random sample

Vedmedyk [2.9K]

Answer:

$P(0.26 \leq p \leq 0.43)=0.7204-0.0032=0.7172$

Step-by-step explanation:

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

The population proportion have the following distribution

$p \sim N(p=0.4,\sqrt{\frac{p(1-p)}{n}}=\sqrt{\frac{0.4(1-0.4)}{91}}=0.0514)$

And we can solve the problem using the z score on this case given by:

$z=\frac{p_o -p}{\sqrt{\frac{p(1-p)}{n}}}$

We are interested on this probability:

$P(0.26 \leq p \leq 0.43)$

And we can use the z score formula, and we got this:

$P(\frac{0.26 -0.4}{\sqrt{\frac{0.4(1-0.4)}{91}}} \leq Z \leq \frac{0.43 -0.4}{\sqrt{\frac{0.4(1-0.4)}{91}}})$

$P(-2.726 \leq Z \leq 0.584)$

And we can find this probability like this:

$P(-2.726 \leq Z \leq 0.584)=P(Z$

7 0

2 years ago

There are 8 roses in a vase of 13 flowers. The rest are daisies.

Blizzard [7]

Answer:

5:13
8:5

Step-by-step explanation:

For first part:

Roses = 8
Daises = All flowers - Roses
Daises = 13 - 8
Daises = 5
Daises:All Flowers = 5:13

For second part:

Roses:Daises = 8:5

I hope this helps!

7 0

2 years ago

Read 2 more answers

How do you solve 4.23-5(0.04+0.09) step by step?

gtnhenbr [62]

Answer:

-0.04

Step-by-step explanation:

4.23-5= -0.77

-0.77*0.04= -0.03

-0.77*0.09= -0.07

-0.07 + -0.03= -0.04

8 0

3 years ago

Please help :(( ive been stuck for a while and im super late

Degger [83]

Answer:

-5^11

Step-by-step explanation:

3 0

2 years ago