All categories

3 years ago

0=x^2-20 can you solve using square root formula? Then by using quadratic formula?

1 answer:

8 0

Sqrt(x^2) = sqrt(20)

x = +2sqrt(5)
x = -2sqrt(5)

x1 = (- 0 + sqrt(0^2 - 4*1*(-20))) / (2*1)
X2 = (-0 - sqrt(0^2 - 4*1*(-20))) / (2*1)

You might be interested in

A clown had 10 balloons that he sold at a carnival dor 6 cents each. if he sold all 10 balloons, how mush money did he make

saveliy_v [14]

Answer:

Step-by-step explanation:

You would do 10*0.06 to get 0.6

So her sold 60 cents worth of balloons

6 0

3 years ago

Read 2 more answers

Solve:

riadik2000 [5.3K]

$\qquad \qquad\huge \underline{\boxed{\sf Answer}}$

Let's solve ~

$\qquad \sf \dashrightarrow \: \dfrac{2x - 1}{5} = \dfrac{x - 2}{2}$

$\qquad \sf \dashrightarrow \: 2(2x - 1) = 5(x - 2)$

$\qquad \sf \dashrightarrow \: 4x - 2 = 5x - 10$

$\qquad \sf \dashrightarrow \: 5x - 4x = -2 + 10$

$\qquad \sf \dashrightarrow \: x = 8$

Value of x is 8

8 0

2 years ago

Read 2 more answers

Jose asks his friends to guess the higher of two grades he received on his math tests. He gives them two hints. The difference o

AlekseyPX

Answer : 96

x – y = 16 --------> equation 1

$\frac{1}{8} x +\frac{1}{2} y = 52$

x is the higher grade and y is the lower grade

We solve the first equation for y

x - y = 16

-y = 16 -x ( divide each term by -1)

y = -16 + x

Now substitute y in second equation

$\frac{1}{8} x +\frac{1}{2} ( -16 + x ) = 52$

$\frac{1}{8} x - 8 + \frac{1}{2} x = 52$

$\frac{1}{8} x + \frac{1}{2} x - 8 = 52$

Take common denominator to combine fractions

$\frac{1}{8} x + \frac{4}{8} x -8 = 52$

$\frac{5}{8} x - 8 = 52$

Add 8 on both sides

$\frac{5}{8} x = 60$

Multiply both sides by $\frac{8}{5}$

x = 96

We know x is the higher grade

96 is the higher grade of Jose’s two tests.

6 0

3 years ago

Read 2 more answers

Find the perimeter.

serg [7]

Answer:

b) 70 feet

Step-by-step explanation:

let me know if you want an explanation please :)

7 0

3 years ago

Read 2 more answers

Find the Value of x so that the ratios are equivalent.

guajiro [1.7K]

x=45

9 x

12 60

x=9×60 divided by 12

9×60=540

540divided by 12=45

7 0

3 years ago