All categories

3 years ago

Please help! I don't know what to do :

Mathematics

2 answers:

Alecsey [184]3 years ago

8 0

Answer:

-2.5(4x-8) + 1.2 (5x-1)

-10x+20+6x-1.2

Step-by-step explanation:

distributive property means multiplying the parentheses by the numbers outside.

so the answer is B

Crazy boy [7]3 years ago

6 0

Distributive Property: a(b+c)=ab+ac

So, is the step where the parentheses are removed.

-2.5(4x-8)+1.2(5x-1)

-10x+20+6x-1.2

B is the answer.

You might be interested in

PLEASE HELP ASAP !!

wariber [46]

Answer:

First figure: $954cm^3$

Second figure: $1,508yd^3$

Third figure:

Height= q
Side length = r

Fourth figure:  $726cm^3$

Explanation:

A. First figure:

1. Formula:

$\text{Volume of a cylinder}=\pi \times radius^2\times length$

2. Data:

radius = 9cm / 2 = 4.5cm

length = 15 cm

3. Substitute in the formula and compute:

$Volume=\pi \times (4.5cm)^2\times (15cm)\approx 954cm^3\approx 954cm^3$

B. Second figure

1. Formula:

$\text{Volume of a leaned cylinder}=\pi \times radius^2\times height$

2. Data:

radius = 12yd

height = 40 yd

3. Substitute and compute:

$Volume=\pi \times (12yd)^2\times (40yd)\approx 1,507.96yd^3\approx 1,508yd^3$

C) Third figure

a) The height is the segment that goes vertically upward from the center of the base to the apex of the pyramid, i.e. q .

The apex is the point where the three leaned edges intersect each other.

b) The side length is the measure of the edge of the base, i.e. r .

When the base of the pyramid is a square the four edges of the base have the same side length.

D) Fourth figure

1. Formula

The volume of a square pyramide is one third the product of the area of the base (B) and the height H).

$Volume=(1/3)B\times H$

2. Data:

height: H = 18cm

side length of the base: 11 cm

3. Calculations

a) Calculate the area of the base.

The base is a square of side length equal to 11 cm:

$\text{Area of the base}=B=(11cm)^2=121cm^2$

b) Volume of the pyramid:

$Volume=(1/3)B\times H=(1/3)\times 121cm^2\times 18cm=726cm^3$

4 0

3 years ago

Read 2 more answers

Which one is the greatest 2/5, 0.35 or 0.3

Tema [17]

0.35 is the answer of the questions

5 0

3 years ago

Express as -80/112 as a rational: numerator = -5

Anastasy [175]

Answer:

-80\112 = -5\7

we divided both numbers by 16

8 0

3 years ago

Freddy is searching for a shirt and discovers that he has 12 shirts for every 6 pair of jeans.If he has 18 shirts, how many pair

KIM [24]

9 jeans. 2 shirts per jean. And 18 divided by 2= 9

6 0

3 years ago

I need your Help, please! THX:)

USPshnik [31]

450 miles
1 in. Per 60 miles
460/60 = 7.5 inches

7 0

3 years ago

Read 2 more answers