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2 years ago

4 is what percent of 20

Mathematics

1 answer:

neonofarm [45]2 years ago

3 0

20%
Finding percentage u have to
Divide 4/20= 0.2 then multiply by 100 to get percentage which is 20%

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Find the missing side or angle. Round to the nearest tenth. C=53° B= 80° a=2 b=[ ? ]

Degger [83]

9514 1404 393

Answer:

b ≈ 2.7

Step-by-step explanation:

The missing angle A is ...

A = 180° -53° -80° = 47°

The law of sines tells you ...

b/sin(B) = a/sin(A)

b = sin(80°)×2/sin(47°) ≈ 2.6931

Side b is about 2.7 units.

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3 years ago

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SOMEONE HELP ME FIND THE Y PLEASE ASAP

Evgesh-ka [11]

Answer:

(Down Below)

Step-by-step explanation:

Plug in the value of x in the left column for all the values in the equation. I will do a couple for you.

Since -4 is the value of x, substitute it into the equation for x.

$y= -4-5=-9$

-1

$y=-1-5=-6$

$y=0-5=-5$

You can do the rest. You got this! Comment if you need more help!

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2 years ago

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How do i rename 2/7 and 10/21 and whats the most common denominator for them

emmainna [20.7K]

Answer:

just multiply 7 by 21 and 21 by 7

2*21/7*21. + 10*7/21*7

41/147+ 70/147

111/147. Ans

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3 years ago

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3 years ago

Give the properties for the equation -2x 2 - y + 10x - 7 = 0.

Sladkaya [172]

Given:

The quadratic equation is

$-2x^2-y+10x-7=0$

To find:

The vertex of the given quadratic equation.

Solution:

If a quadratic function is $f(x)=ax^2+bx+c$ , then

$Vertex=\left(\dfrac{-b}{2a},f(\dfrac{-b}{2a})\right)$

We have,

$-2x^2-y+10x-7=0$

It can be written as

$-2x^2+10x-7=y$

$y=-2x^2+10x-7$ ...(i)

Here, $a=-2,b=10,c=-7$ .

$\dfrac{-b}{2a}=\dfrac{-10}{2(-2)}$

$\dfrac{-b}{2a}=\dfrac{-10}{-4}$

$\dfrac{-b}{2a}=\dfrac{5}{2}$

Putting $x=\dfrac{5}{2}$ in (i), we get

$y=-2(\dfrac{5}{2})^2+10(\dfrac{5}{2})-7$

$y=-2(\dfrac{25}{4})+\dfrac{50}{2}-7$

$y=\dfrac{-50}{4}+25-7$

$y=\dfrac{-25}{2}+18$

On further simplification, we get

$y=\dfrac{-25+36}{2}$

$y=\dfrac{11}{2}$

So, the vertex of the given quadratic equation is $\left(\dfrac{5}{2},\dfrac{11}{2}\right)$ .

Therefore, the correct option is A.

3 0

3 years ago