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3 years ago

HELP ASAP!!Solve for x. Enter the solutions from least to greatest.

1 answer:

4 0

X^2 - 5x - 14 = 0

what multiplies to negative 14 and adds to negative 5? -7 and positive 2.

(x - 7) (x + 2) = 0

Lesser x = -2
Greater x = 7

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Jay wants to rent a metal detector. A rental company charges a one-time fee of $15 plus $2 per hour to rent a metal detector. Ja

user100 [1]

Step-by-step explanation:

$15 initial fee. $2 per hour. $35 limit.

35 - 15 = 20

After the initial fee, he has $20 left.

20 ÷ 2 = 10

He can rent the metal detector for 10 hours.

4 0

3 years ago

The ratio of the perimeters of two similar triangles is 4:7. What is the area of each of these triangles if the sum of their are

Mashcka [7]

Answer:

The area of triangles are 16 cm^2 and 49 cm^2

Step-by-step explanation:

we know that

If two figures are similar, the ratio of its perimeters is equal to the scale factor and the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x ----> the area of the smaller triangle in square centimeters

y ----> the area of the larger triangle in square centimeters

we know that

$z=\frac{4}{7}$

$\frac{x}{y}=z^2$

$\frac{x}{y}=(\frac{4}{7})^2$

$\frac{x}{y}=\frac{16}{49}$

$x=\frac{16}{49}y$ -----> equation A

$x+y=65$ ----> equation B

solve the system by substitution

substitute equation A in equation B

$\frac{16}{49}y+y=65$

solve for y

$\frac{65}{49}y=65$

$y=49\ cm^2$

Find the value of x

$x=\frac{16}{49}(49)$

$x=16\ cm^2$

therefore

The area of triangles are 16 cm^2 and 49 cm^2

3 0

4 years ago

Read 2 more answers

Is this table proportional?

seraphim [82]

Answer: y=3x

Step-by-step explanation:

2x3=6

3x3=9

5x5=15

6x3=18

3 0

3 years ago

Read 2 more answers

An athlete ran 200 meters in 19.19 seconds. Suppose that he ran the first half of that race (around a curve) in 10.75 seconds. H

SOVA2 [1]

The time needed to run the second half of the race is 8.44 s

Step-by-step explanation:

The total distance covered by the athlete during the race is

d = 200 m

And the total time taken to cover this distance is

T = 19.19 s

We also know that the time the athlete needs to cover the first half of the race is

$t_1 = 10.75 s$

Also, we know that

$T=t_1 + t_2$

where $t_2$ is the time the athlete takes to cover the second half of the race.

Re-arranging this equation and susbtituting the values, we find the value of t2:

$t_2 = T-t_1 = 19.19-10.75=8.44 s$

Learn more about uniform motion:

brainly.com/question/8893949

#LearnwithBrainly

5 0

3 years ago

Jason is going to a basketball game 5 miles away from his home. He has only 30 minutes to get there before the game starts. At w

kramer

Answer:

6 min

Step-by-step explanation:

6 0

3 years ago