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3 years ago

What equals -36 when added but equals 160 when multiplied.

1 answer:

7 0

X + y = -36

x * y = 160

x = -36 - y

(-36-y) * y = 160

-36y - y^2 = 160

y^2 + 36y + 160 = 0

y = -5.19 and x = -30.8

or

y = -30.8 and x = -5.19

You can write them in this form too

x+ysqrt(z)

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-5(6y + 4) + 25 = 15(2y + 5) + 73

Nataly_w [17]

Answer:

y = - 143/60 = -2 23/60

Step-by-step explanation:

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2 years ago

The population of bacteria in a colony is increasing. The number of bacteria at time t

vfiekz [6]

Step-by-step explanation:

a) if the population is 3000 and it is being multiplied 1.15 than it is 15%. I found this by multiplying 1.15 by 100 to make it percent than anything over 100 is an increase.

b)im not so sure on this one but I think if t = 0 than it would be p= 3000 x 1.15 x0 which would equal 0

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2 years ago

What is the slope of the line that passes through (3, −7) and (−1, 1)? (1 point)

ELEN [110]

Answer:

The slope of the line is -2

Step-by-step explanation:

The rule of the slope of a line is:

$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ , where

$(x_{1},y_{1})$ and $(x_{2},y_{2})$ are two points on the line

Let us find the slope using the rule above

∵ The line passes through points (3, -7) and (-1 , 1)

∴ $x_{1}$ = 3 and $x_{2}$ = -1

∴ $y_{1}$ = -7 and $y_{2}$ = 1

Substitute these values in the rule above to find m

∴ $m=\frac{1--7}{-1-3}=\frac{1+7}{-4}=\frac{8}{-4}=-2$

∴ The slope of the line that passes through the given points is -2

8 0

4 years ago

What is an number between 300 and 400 it is divisible by 5 and 9

Readme [11.4K]

The answer is 360. 360 divided by 9 is 40, and 360 divided by 5 is 72. hope this helps!

8 0

3 years ago

Read 2 more answers

I need help on this question

melisa1 [442]

Answer:

C. y = 8x

Step-by-step explanation:

Using the slope formula, we can calculate the rate of Marisol's and Timothy's Machines.

$m = \frac{y_1-y_2}{x_1-x_2}$

Marisol:

$m = \frac{18-12}{3-2} \\m=6$

Timothy:

$m=\frac{54-36}{6-4} \\m=\frac{18}{2} \\m=9$

Now that we know the rate of their machines, we need to choose a rate that is between 6 and 9. Therefore, the rate of Zorian's machine needs to be y = 8x.

6 0

3 years ago