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3 years ago

A child is 2-1/2 feet tall the child’s mother is twice as tall as the child how tall is the child’s mother ?

Mathematics

1 answer:

ser-zykov [4K]3 years ago

6 0

Answer:

5 feet

Step-by-step explanation:

$2 \frac{1}{2} * 2 = 5$

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Find f(x)=8x-3; g(x)=4x+5

GrogVix [38]

Answer:

Need more info

Step-by-step explanation:

What is x?

7 0

3 years ago

Simplify the expression. 7x^2+3-5(x^2-4) edguneity

Law Incorporation [45]

Answer:

2x^2+23.

Step-by-step explanation:

Combine like terms.

This expression simplified is 2x^2+23.

4 0

3 years ago

If 10^2y = 25, then 10^-y equals: (a) -1/5 (b) 1/625 (c) 1/50 (d) 1/25 (e) 1/5

Gemiola [76]

<h3>given:</h3>

$10 ^{2y} = 25$

${10}^{y} = .......$

<h3>solution:</h3>

$10 ^{2y} = 25$

$(10y {)}^{2} = {5}^{2}$

$10y = 5$

$\frac{1}{ {10}^{y} } = \frac{1}{5}$

${10}^{ - y} = \frac{1}{5}$

therefore, the correct answer is option E.

8 0

2 years ago

Read 2 more answers

Find the mean and the standard deviation for each set of values. Show your work. 15,17,19,20,14,23,12

vekshin1

1. Mean.

$\overline{x}=\dfrac{15+17+19+20+14+23+12}{7}=\dfrac{120}{7}\approx\boxed{17.14}$

2. Standard deviation.

First we have to square each value and calculate the mean of that squares:

$\overline{x^2}=\dfrac{15^2+17^2+19^2+20^2+14^2+23^2+12^2}{7}=\boxed{\dfrac{2144}{7}}$

so the variance:

$s^2=\overline{x^2}-\overline{x}^2=\dfrac{2144}{7}-\left(\dfrac{120}{7}\right)^2\approx\boxed{12.41}$

and the standard deviation:

$s=\sqrt{s^2}=\sqrt{12.41}\approx\boxed{3.52}$

3 0

3 years ago

X+8(x+2) =52 can someone help me pls with these question

ki77a [65]

Answer:

The answer is X=4

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

x+8(x+2)=52

x+(8)(x)+(8)(2)=52(Distribute)

x+8x+16=52

(x+8x)+(16)=52(Combine Like Terms)

9x+16=52

Step 2: Subtract 16 from both sides.

9x+16−16=52−16

9x=36

Step 3: Divide both sides by 9.

9x 9 = 36 /9

x=4

5 0

3 years ago