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3 years ago

Please help me if you can

Mathematics

1 answer:

omeli [17]3 years ago

8 0

Answer:

1. 1/2(5)(2) = 5 yd squared

2. 1/2(6)(8) = 24 ft squared

3. 1/2(12.4)(18) = 111.6 cm squared

4. 1/2(3.5)(6) = 10.5 m squared

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A bookstore buys Algebra 1 books at a wholesale price of $23 each. It marks up the price by 92% and then sells the Algebra 1 boo

IceJOKER [234]

Answer:

The mark up is $21.16 and the final selling price is $44.14

Step-by-step explanation:

To find the mark up price, you simply multiply the cost by the mark up percentage. This will give you the mark up.

$23 * 92% = $21.16

Now to find the total selling price, we add the cost and the mark up together.

$23 + $21.16 = $44.16

5 0

3 years ago

Part A: Plot the points A(-8,7) and B(6,-9). Mark the halfway point on AB and label it point M. What are the coordinates of M? P

vredina [299]

Answer:

a. $M(x,y) = (-1,-1)$

b. $D(-4,-9)$

Step-by-step explanation:

Given

A(-8,7) and B(6,-9).

Solving (a):

Determine the Midpoint M;

This is calculated as follows;

$M(x,y) = (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$

Where

$(x_1,y_1) = (-8,7)$

$(x_2,y_2) = (6,-9)$

Substitute these values in the formula

$M(x,y) = (\frac{-8+6}{2},\frac{7-9}{2})$

$M(x,y) = (\frac{-2}{2},\frac{-2}{2})$

$M(x,y) = (-1,-1)$

Hence; the midpoint is (-1,-1)

Solving (a):

Here, we have

C = (2,7)

M; Midpoint = (-1,-1)

Required: Determine D

This is calculated as follows;

$M(x,y) = (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$

Where

$(x_1,y_1) = (2,7)$

$(x,y) = (-1,-1)$

Substitute these values in the formula

$(-1,-1) = (\frac{2+x_2}{2},\frac{7+y_2}{2})$

Solving for x2

$-1 = \frac{2 + x_2}{2}$

Multiply both sides by 2

$-2 = 2 + x_2$

Subtract 2 from both sides

$x_2 = -2 - 2$

$x_2 = -4$

Solving for y2

$-1 = \frac{7 + y_2}{2}$

Multiply both sides by 2

$-2 = 7 + y_2$

Subtract 7 from both sides

$y_2 = -2 - 7$

$y_2 = -9$

Hence, the coordinates of D is

$D(-4,-9)$

7 0

4 years ago

To qualify for a police academy, applicants are given a test of physical fitness. The scores are normally distributed with a mea

djyliett [7]

Answer:

X₀ = 71.65

Step-by-step explanation:

given,

mean (μ ) = 64

standard deviation (σ) = 9

σ² = 81

selected candidate are top 20 % candidate

P( X > X₀) = 0.2

$P( Z > \dfrac{X_0-\mu}{\sigma}) = 0.2$

$P( Z > \dfrac{X_0-64}{9})= 0.2$

P( Z > Z₀) = 0.2

$Z_0 = 0.85 = \dfrac{X_0-64}{9}$

X₀ = 71.65

Hence, the cut off score is equal to X₀ = 71.65

6 0

3 years ago

I don't know the answer to this and the hints not helping so please help?

balandron [24]

I'm pretty sure that you multiply 10x by 6. Since it is length by width those are the length and the width.

Glad I could help!

6 0

4 years ago

What is the value of a in the equation 3Q+b=54, when b = 9? 15 18 21 27

vladimir1956 [14]

Answer: 15

Step-by-step explanation:

3q+9=54

-9 -9

3q = 45

—————-

Q=15

4 0

3 years ago