Select the correct answer from the drop-down menu.<br> Simplify the expression.

Find the zeros of the function: f(x) = x^2 - 4x - 21

IrinaK [193]

Answer:

x = 7, x = -3

Step-by-step explanation:

We can find the zeros by factoring the equation using the zero product property.

x^2-4x-21 = 0

(x-7)(x+3) = 0

x = 7

x = -3

Zeros are x=7 and x= -3.

5 0

3 years ago

The box plots below show the lifespan, in months, of laptop batteries manufactured by four companies: box plot labeled Company A

RUDIKE [14]

The highest median lifespan would be represented on the box plot that has the highest median value.

Company A: 23
Company B: 24
Company C: 22
Company D: 22.5

The company with the highest median lifespan of batteries is company B.

8 0

3 years ago

Read 2 more answers

Vic's favorite cookie recipe uses 250 grams of flour for every 170 grams of butter. Imani made cookies using 750 grams of flour

Viefleur [7K]

Vic's cookies having a ratio of flour to butter of 250/170 contains less

butter than Imani's cookies, 750/630, what Vic will think is therefore;

(A) Imani's cookies have too much butter

<h3>Which method can be used to evaluate the cookies?</h3>

The quantity of flour per 170 grams of butter in Vic's cookies = 250 grams

The amount of flour Imani uses for every 630 grams of butter = 750 grams

Required:

What Vic will think about the amount of butter in Imani's cookies

Solution;

$Ratio \ of \ butter \ per \ gram \ of \ flour \ in \ Vic's \ cookies = \dfrac{170 \, g}{250 \, g} = \dfrac{17}{25} = \mathbf{0.68}$

$Ratio \ of \ butter \ per \ gram \ of \ flour \ in \ Imani's\ cookies = \dfrac{630\, g}{750\, g} = \dfrac{17}{25} = \mathbf{0.84}$

Imani's cookies contains more cookies than Vic's cookies, what Vic will

think of the amount of butter in Imani's cookies is therefore;

(A) Imani's cookies have too much butter

Learn more about fractions here:

brainly.com/question/24378782

7 0

2 years ago

Goran is riding his bicycle. He rides for 22.5 kilometers at a speed of 9 kilometers per hour. For how many hours does he ride?

astra-53 [7]

Answer: He rides for 2.5 hours or 2 and a half hours.

Step-by-step explanation:

He needs to complete a trajectory of 22.5 kilometers.

He rides 9 kilometers per hour.

Divide the total by the amount of kilometers that he rides.

$\frac{22.5}{9}=2.5h$

6 0

3 years ago

i need to find the area of a rectangle using the formula A=b*h the height is 810 cm the base is 10 meters...i know i need to con

leva [86]

Answer:

81000 $cm^{2}$ or 8.1 $m^{2}$

Step-by-step explanation:

1m = 100cm

10m = 1000cm

a= b*h

a= 1000cm * 810cm

= 810000 $cm^{2}$

1 $m^{2}$ = 10000 $cm^{2}$

810000 $cm^{2}$ = 8.1 $m^{2}$

7 0

3 years ago

Select the correct answer from the drop-down menu. Simplify the expression.