All categories

3 years ago

Helppppppppppppppp plz

Mathematics

1 answer:

expeople1 [14]3 years ago

5 0

Answer:

Step-by-step explanation:

You might be interested in

How would I solve this?

givi [52]

Answer:

The valid value of x is x=-2

Step-by-step explanation:

we know that

The sum of the interior angles of any quadrilateral must be equal to 360 degrees

$(7x^{2}-24x)+100+(24-46x)+(3x^{2}+56)=360$

solve for x

Combine like terms

$10x^{2}-70x+180=360$

$10x^{2}-70x-180=0$

Divide by 10 both sides

$x^{2}-7x-18=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}-7x-18=0$

$a=1\\b=-7\\c=-18$

substitute in the formula

$x=\frac{-(-7)(+/-)\sqrt{-7^{2}-4(1)(-18)}} {2(1)}$

$x=\frac{7(+/-)\sqrt{121}} {2}$

$x=\frac{7(+/-)11} {2}$

$x=\frac{7(+)11} {2}=9$

$x=\frac{7(-)11} {2}=-2$

Remember that

The measure of the interior angle cannot be a negative number

For x=9

we have that the measure of one interior angle of quadrilateral is

$24-46x$

substitute the value of x

$24-46(9)=-390\°$

therefore

The value of x=9 cannot be a solution

For x=-2

The measure of the interior angles are

$(7(-2)^{2}-24(-2))=76\°\\100\°\\(3(-2)^{2}+56)=68\°\\24-46(-2)=116\°$

therefore

The valid value of x is x=-2

7 0

3 years ago

monitta

Answer:

21 calories per cup

Step-by-step explanation:

4cups↔84calories

1cup ↔less

1/4x84=21calories

8 0

3 years ago

Which equation represents a quadratic relation?

Finger [1]

Answer:

a) y = 4x^2

Step-by-step explanation:

Because in a) y = 4x^2 the degree of equation is 2.

7 0

3 years ago

Please Help!!! brainliest answer!

andrezito [222]

It’s c for sure bro because look at the triangle and the letter trust homie

7 0

4 years ago

Luke shaded 20 squares on his hundredths grid. Bella shaded 30 square on her hundredths grid. Write two decimals greater than Lu

Anna35 [415]

0.25
0.26

equivalent decimals:
0.2
0.200

4 0

3 years ago