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3 years ago

Find x in the image below. Simplify any radicals.

Mathematics

1 answer:

IgorLugansk [536]3 years ago

8 0

Answer:

Step-by-step explanation:

x(x+80) = 30²

x²+80x=900

x²+80x-900=0

(x+90)(x-10) = 0

x= -90 or x= 10

x = 10 is the answer

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Factor this polynomial expression. x^2-16

V125BC [204]

Hi,

We know that:

a² -- b² = (a -- b)(a + b).

With a = x, and b = 4, we have:

x² -- 16 = x² -- 4² = (x -- 4)(x + 4).

As simple as that. Have you understood ?

Green eyes.

6 0

3 years ago

A conjecture and the flowchart proof used to prove the conjecture are shown.

posledela

Answer:

1. Definition of parallelogram

Step-by-step explanation:

1. Definition of parallelogram

2. Angle Congruence Postulate

3. m<2 + m<3 =180

4. m<1 + m<3 =180

5. Definition of supplementary

7 0

4 years ago

HELP PLEASE THIS IS REALLY IMPORTANT

Vikentia [17]

Distance formula:
$d= \sqrt{(x_b-x_a)^2+(y_b-y_a)^2} 
\\
d=3 \ \ x_a= 4 \ \ y_a=2 \\ \\ \boxed{ 3= \sqrt{(x-4)^2+(y-2)^2} }$

5 0

4 years ago

It is found that the number of raisins in a box of a popular cereal is normally distributed, with a mean of 133 raisins per box

gogolik [260]

Answer:

1.4

Step-by-step explanation:

We have been given that the number of raisins in a box of a popular cereal is normally distributed, with a mean of 133 raisins per box and a standard deviation of 10 raisins. My cereal box has 147 raisins.

To find the z-score for this box of cereal, we will use z-score formula.

$z=\frac{x-\mu}{\sigma}$ , where,

z = Z-score,

x = Sample score,

$\mu$ = Mean,

$\sigma$ = Standard deviation.

Upon substituting our given values, we will get:

$z=\frac{147-133}{10}$

$z=\frac{14}{10}$

$z=1.4$

Therefore, the z-score for this box of cereal is 1.4.

7 0

4 years ago

On a piece of paper, graph f(x) = 6 . (0.4)". Then determine which answer

Arte-miy333 [17]

Answer:

B. Graph B

(Symbolab Graphing Calculator is really helpful to do this kind of stuff ^^)

4 0

3 years ago