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4 years ago

(3x –7x)+(3x +4x).

Mathematics

2 answers:

Alisiya [41]4 years ago

8 0

Answer: 3x

Step-by-step explanation: since they are all like terms, you start from the left in the parentheses and subtract 3x from -7x which equals -4x. Then add 3x to 4x which is 7x. Then add -4x to 7x and you get your answer which is 3x

deff fn [24]4 years ago

6 0

Answer:

A positive 3x

Step-by-step explanation:

since both parts have the same variable you could add them or subtract them together

(3x-7x)+(3x+4x)

You will subtract 3x-7x which will give you a negative 4x

You will do the same on the other side

Add 3x+4x and it will give you a positive 7x

-4x+7x=will give you an positive 3x

Hopes this helps

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Find the value of x.

andre [41]

The triangle is an isosceles triangle because of its degrees. A triangle consists of 180 degrees therefore, 180-90-45 simply makes it 45 matching the other side.

So we can assume that side b is also equivalent to side a. Here we use the pythagorean theorem to find x

a^2 + b^2 = c^2
5^2 + 5^2 = c^2
25+25=50

The square root of 50 is 7.1
x= 7.1

8 0

2 years ago

PLEASE HELP 100 POINTS!

krok68 [10]

Answer:

800%

Step-by-step explanation:

Volume of a square based pyramid

$\sf V=\dfrac{1}{3}a^2h$

where:

a = base side length
h = height

Given values for Pyramid A:

a = 14 inches
h = 6 inches

Substitute the given values into the formula to find the volume of Pyramid A:

$\begin{aligned}\textsf{Volume of Pyramid A} & = \sf \dfrac{1}{3}(14)^2(6)\\\\& = \sf \dfrac{1176}{3}\\\\& = \sf 392\:\: in^3 \end{aligned}$

Given:

Volume of Pyramid B = 3136 in³

To find how many times bigger Pyramid B is than Pyramid A, divide the volume of Pyramid B by the volume of Pyramid A:

$\implies \sf \dfrac{3136}{392}=8$

Therefore, the volume of Pyramid B is 8 times bigger than the volume of Pyramid A.

8 as a percentage is 800%, since 800/100 = 8.

Therefore, the volume of Pyramid B is 800% the volume of Pyramid A.

To verify this, find 800% of the volume of Pyramid A:

⇒ 800% of 392

= 800/100 × 392

= 8 × 392

= 3136

8 0

2 years ago

What is the simplest form of the ratio 18b^2 to 45b

Svetradugi [14.3K]

Treat it like a fraction
18b^2/45b
divide top and bottom by b
18b/45
divide top and bottom by 3
6b/15
divide top and bottom by 3 again
2b/5
2b:5 is the simpliest form of the ratio

7 0

4 years ago

I really need some help it's hard to understand!

Vedmedyk [2.9K]

C you just add them divide by 2

8 0

4 years ago

Read 2 more answers

(Giving brainliest because I tried to solve this but I can’t for some reason)

CaHeK987 [17]

Answer:

mean is 5