All categories

3 years ago

I need to know what the answer is!?

Mathematics

2 answers:

ivanzaharov [21]3 years ago

5 0

Answer:

$\boxed{A. 2}$

Step-by-step explanation:

Hey there!

Well we first need to solve the top part.

15 + 5 * 3

5*3 = 15

15 + 15 = 30

3^2 + 6

3*3 = 9

9+6 = 15

Now we have 30 ÷ 15 = 2.

Hope this helps :)

ArbitrLikvidat [17]3 years ago

3 0

Answer:

Step-by-step explanation:

Use PEMDAS

First simplify the exponent (9)

Next multiply 5 and 3 (15)

Now add 15 and 15 (30)

Add 9 and 6 (15)

Lastly simply 30 by 15 (2)

You might be interested in

0.29m + 10= 0.35m. What is m

ehidna [41]

0.29m+10=0.35m

0.29m-0.29m+10= 0.35m-0.29m

10=0.06 m

Divide by 0.06 for 10 and 0.06

10/0.06= 0.06/0.06 m

m= 166.66666

Answer is m = 166.66666- the number 6 continues

8 0

2 years ago

its due in 45 minutes, help "Which table does not represent a proportional relationship? A 2-column table with 3 rows. Column 1

Novay_Z [31]

Answer: the one with the 12,18 and 22 step by step equation

hope this helped

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

gary deposits 3700 in an account that pays 2.15% simple interest he keeps the money in the account for 3 years but doesn’t make

zzz [600]

Answer:

238.65

Step-by-step explanation:

To find the simple interest we use the formula:

A = P(1 + rt)

Let's break down all the variables that we have.

P = 3,700

r = 2.15% or 0.0215

t = 3

So let's put all our variables into the formula.

A = P(1 + rt)

A = 3,700(1 + (0.0215)(3))

A = 3,700(1 + 0.0645)

A = 3,700(1.0645)

A = 3938.65

Gary will have a total of 3938.65 in his account after 3 years. Now to find how much he made in interest, we simply subtract the total after 3 years to his initial amount.

Interest = 3938.65 - 3700

Interest = 238.65

4 0

3 years ago

Question 4 (1 point)

Nimfa-mama [501]

Answer:

where is the diagram for the question?

8 0

2 years ago

An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and

egoroff_w [7]

Answer:

a) $P(140$

$P(0.036$

b) $P(140< \bar X$

Step-by-step explanation:

Previous concepts

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".

Part a

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

$X \sim N(139,28.1)$

Where $\mu=139$ and $\sigma=28.1$

We are interested on this probability

$P(140$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(140$

And we can find this probability like this:

$P(0.036$

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.

$P(0.036$

Part b

For this case we select a sample size of n =32. Since the distribution for X is normal then the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu=139, \frac{\sigma}{\sqrt{n}}=\frac{28.1}{\sqrt{32}}=4.97)$

And the new z score would be:

$Z=\frac{\bar X -\mu}{\sigma_{\bar x}}$

$P(140< \bar X$

5 0

2 years ago