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4 years ago

Why did the kindergartener take her books to zoo

Mathematics

1 answer:

ss7ja [257]4 years ago

8 0

She wanted to learn to read between the lions

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Solve for x 9 ( x + 1 ) = 25 + x

ELEN [110]

Answer: x=2

Step-by-step explanation:

Given

9(x+1)=25+x

Distributive property

9x+9=25+x

Subtract x on both sides

9x+9-x=25+x-x

8x+9=25

Subtract 9 on both sides

8x+9-9=25-9

8x=16

Divide 8 on both sides

8/8 x=16/8

x=2

Hope this helps!! :)

Please let me know if you have any question

6 0

3 years ago

Read 2 more answers

In the United States the ages 13 to 55+ of smartphone users approximately follow a normal distribution with approximate mean and

andrezito [222]

Answer:

P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 ) = 0.8186

Step-by-step explanation:

Solution:

- Let X be a random variable that denotes the age of people who use smartphones.

- The random variable X follows a normal distribution with parameters mean (u) and standard deviation (s).

-The normal distribution can be expressed as:

X~ N ( u , s^2 )

X~ N ( 36.9 , 13.9^2 )

- The probability that a random smartphone user in the age range 13 to 55+ is between 23 and 64.7 years old can be expressed as:

P ( 23 < X < 64.7 )

- We will compute the Z-score values for the interval:

P ( 23 < X < 64.7 ) = P ( (x1 - u) / s < Z < (x2 - u) / s )

P ( 23 < X < 64.7 ) = P ( (23 - 36.9) / 13.9 < Z < (64.7 - 36.9) / 13.9 )

P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 )

- We will use Z-table to evaluate:

P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 ) = 0.8186

5 0

4 years ago

Read 2 more answers

In the 8-sided figure below, adjacent sides meet at right angles and the lengths are given are in meters. What is the perimeter

Nataly [62]

Answer:

Step-by-step explanation:

Look at the figure below. The perimeter is the same as if the corners were moved out to form a square. Then you have 4 congruent sides of length 20.

P = 4 * 20 = 80

4 0

3 years ago

Help... do it now if you can pls...

slavikrds [6]

Answer:

1.A,B,C,D

2. AB, CD

3. AC, BD

4. Line AD (don't take my word for this one)

Step-by-step explanation:

7 0

3 years ago

My cousin borrowed $15,000 for a new car loan for 5 years. He told me that at the end of the loan, he had paid $21,000 for the i

Umnica [9.8K]

To solve this problem we are going to use the simple interest formula: $A=P(1+rt)$
where
$A$ is the sum of the <span>interest and the principal
</span> $P$ is the principal
$r$ is the interest rate in decimal form
$t$ is the time in years
<span>
We know for our problem that </span> $A=21000$ , $P=15000$ , and $t=5$ . Now, let $x$ represents our interest rate. To express the interest rate in decimal form, we are going to divide the rate by 100%:
$r= \frac{x}{100}$
$r=0.01$ .
Now that we have all the values we need, lets replace them in our simple interest formula to find the interest rate:
$A=P(1+rt)$
$21000=15000[1+(0.01x)(5)]$
$\frac{21000}{15000} =1+0.05x$
$1+0.05x=1.4$
$0.05x=0.4$
$x= \frac{0.4}{0.05}$
$x=8$

We can conclude that the interest rate of your cousin's loan was 8%.

4 0

3 years ago

Read 2 more answers