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pentagon [3]
3 years ago
11

I'll give brainiest all quadrilaterals have four sides true or false pls explain why

Mathematics
1 answer:
babunello [35]3 years ago
4 0

Answer:

<em><u>True</u></em>

Every quadrilateral has 4 sides, 4 vertices, and 4 angles. 4. The total measure of all the four interior angles of a quadrilateral is always equal to 360 degrees.

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PLEASE HELP DUE NOW!!!<br> WILL MARK BRAINLIEST!!!
Sav [38]

Answer:

(-5, -8)

Step-by-step explanation:

- 9x + 5y = 5 \\  - 5x + 5y =  - 15

- 9x + 5y = 5 \\ 5x - 5y = 15

- 4x = 20

- x = 5

x =  - 5

-5( - 5) + 5y =  - 15

25 + 5y =  - 15

5y = -40

y = -8

3 0
2 years ago
Read 2 more answers
4/5-2/15=<br><br><br><br> 4/7-2/8=<br><br><br><br> Find the difference
GenaCL600 [577]
1. 4/5 - 2/15 = 2/3

2. 4/7 - 2/8 9/28
5 0
3 years ago
A chemist wants to mix a 66% alcohol solution with eight liters of 54% alcohol solution to produce a solution that is 65% alcoho
Rzqust [24]

Answer:

We have 8 liters of 54% alcohol.

We will add "x" liters of 66% alcohol to make "8 +x" liters of 65% alcohol.

54 * 8 + 66 x =   65 (8 + x)

432 + 66x = 520 + 65x

x = 88 liters

Step-by-step explanation:

3 0
3 years ago
A city stadium has 7,128 seats. The city wants to add 1,694 seats to the stadium. The stadium will now hold blank seats.
Naya [18.7K]

Answer: idk i wanna know the answer too

Step-by-step explanation:

3 0
3 years ago
By what percent will the product of two numbers decrease if one of them is decreased by 25% and the other one is decreased by 50
olchik [2.2K]
Well, let's say the numbers are "a" and "b"

so a * b = ab

ok... now, if we reduce "a" by 25%, that means the new size is just 75% of the old one, how much is 75% of a? well, (75/100) * a, or 0.75a

now let's reduce "b" by 50%, that means the new size is 50% or half,  how much is 50% of b? well (50/100)*b, or 0.5b

\bf \begin{cases}&#10;a\cdot b\implies  ab\\&#10;0.75a\cdot 0.5b\\&#10;\qquad 0.75\cdot 0.5ab\\&#10;\qquad 0.375ab&#10;\end{cases}

now, the new size of "ab" is just 0.375ab... well, let's revert the decimal format by simply multiplying by 100

0.375 * 100, is 37.5%

the new size of "ab" is just 37.5% of the original "ab"

it decreased by 100 - 37.5 or 62.5%
5 0
3 years ago
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