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ddd [48]
3 years ago
15

Please someone help me plz help

Mathematics
2 answers:
Yakvenalex [24]3 years ago
4 0
53+78=131
180-131=49
10x-1=49
10x=50
Divide be 10 on each side
X=5
atroni [7]3 years ago
3 0

Answer:

x = 5

Step-by-step explanation:

Angles in a triangle add up to equal 180

Hence, 10x - 1 + 78 + 53 = 180

( Note that we just created an equation that we can use to solve for x )

We now solve for x using the equation we created

10x - 1 + 78 + 53 = 180

Combine like terms

10x + 130 = 180

Subtract 130 from both sides

10x = 50

Divide both sides by 10

x = 5

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UPS charges $7 for the first pound, and $0.20 for each additional pound. FedEx charges $5 for the first pound and $0.30 for each
grigory [225]

Answer:

1. 20 pounds

2. $11

Step-by-step explanation:

To set this up, you have to use a system of equations. It would look like this, where p is pounds and t is total cost:

UPS: t=7+0.20p

FedEx: t=5+0.30p

In order to solve a system of equations you must either a.) graph it, or b.) set them equal to each other.

If you graph it, the answer is where the two lines intersect.

If you set them equal to each other, solve it.

I will set them equal to each other in this:

7+0.20p=5+0.30p

The first step in a problem like this, where there's the same variable on both sides, is to subtract the smaller variable from both sides. In this case, it is  0.20x. That would turn the equation into:

7=5+0.10p

After that, you must solve it like a regular two-step equation.

Start by subtracting 5 from both sides:

2=0.10p

Now, you must divide both sides by 0.10.

\frac{2}{0.10}=\frac{0.10p}{0.10}

That would give us:

20=p

This means that in order for the prices to be the same, the package must be 20 pounds.

Now in order to find the total cost, you must plug 20 into one of the equations. It doesn't matter which, since they both equal the same. I will plug it into the FedEx equation:

t=5+0.30(20)

Now you can just use a calculator and solve that or do it by hand. Multiply 0.30 by 20, to get 6, then add 5, which equals 11.

You should get: t=11.

This means that the total cost, when the costs are the same for both FedEx and UPS, is $11.

3 0
3 years ago
A cylinder has a height of 6 millimeters and a radius of 4 millimeters. What is its volume? Use ​ ≈ 3.14 and round your answer t
netineya [11]

Answer:

V=301.44\ \text{mm}^2

Step-by-step explanation:

Given that,

Height of the cylinder, h = 6 mm

Radius of the cylinder, r = 4 mm

We need to find the volume of the cylinder. The formula for the radius of the cylinder is given by :

V=\pi r^2 h

Putting given values,

V=3.14\times (4)^2 \times 6\\\\V=301.44\ \text{mm}^2

So, the volume of the cylinder is 301.44\ \text{mm}^2.

4 0
3 years ago
Simplify 7 - (-4) + 3(-6)
jeka94

Answer:

-7

Step-by-step explanation:

7 - (-4)= 11

            +

3(-6)= -18

=-7

8 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAP!!!! ILL MAKE YOU BRAINIEST!!!<br><br> What is the length of XY?
JulijaS [17]
Not sure, but i think it's 4
6 0
3 years ago
Read 2 more answers
If f(1) = 10, what is f(3)?
Alexus [3.1K]

Answer:

30

Step-by-step explanation:

multiply each f by the same root numeral

4 0
3 years ago
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