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3 years ago

42:15 = What is the ratio

Mathematics

1 answer:

vfiekz [6]3 years ago

8 0

The ratio is 14:5, as 42 divided by 3 is 14 and 15 divided by 3 is 5.

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Serjik [45]

Answer:

Step-by-step explanation:the first one is 8

Second 3 3- 6

4 0

3 years ago

The amount of time Ricardo spends brushing his teeth follows a Normal distribution with unknown mean and standard deviation. Ric

Papessa [141]

Let $X$ denote the number of minutes spent brushing his teeth, and let $\mu$ be the mean and $\sigma$ the standard deviation for this distribution.

$\mathbb P(X$

The z-score corresponding to this probability is approximately $z=-0.2533$ , which means

$\dfrac{1-\mu}\sigma=-0.2533\iff\mu-0.2533\sigma=1$

Next, (note the sign change)

$\mathbb P(X>2)=0.02\implies\mathbb P(X\le2)=\mathbb P\left(\dfrac{X-\mu}\sigma\le\dfrac{2-\mu}\sigma\right)=0.98$

The corresponding z-score is approximately $z=2.0538$ , so you have

$\dfrac{2-\mu}\sigma=2.0538\iff\mu+2.0538\sigma=2$

Solving the two equations for $\mu$ and $\sigma$ , you'll find that the mean is approximately $\mu=1.1098$ and the standard deviation is approximately $\sigma=0.4334$ .

7 0

3 years ago

Cual es la ecuación recta de m=2 y p (2,3)

Anton [14]

Answer:

y=2x-1

Step-by-step explanation:

use slope formula

the substitute into slope intercept form

6 0

3 years ago

A survey of a group of seventh graders and a group of teachers at a local middle school asked how many siblings they each have.

Harlamova29_29 [7]

Answer:

The teachers have more combined siblings than the students.

Select 3 what?

Step-by-step explanation:

3 0

3 years ago

In the figure, m ll n. If the measure of angle 8 is (4x +7) and the measure of angle 2 is 107 degrees, what is the value of x? E

Archy [21]

Given:

$\begin{gathered} m\angle8=4x+7 \\ m\angle2=107 \end{gathered}$ $\begin{gathered} 4x+7+107=180\degree \\ 4x+114=180 \\ 4x=180-114 \\ 4x=66 \\ x=16.5 \end{gathered}$

3 0

2 years ago