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3 years ago

Need help plz answer thank you!

Mathematics

2 answers:

Dafna1 [17]3 years ago

8 0

Answer:

Step-by-step explanation:

I set up a proportion

1/2 apple/3 days

3 apples/ x

I cross multiplied after that

AysviL [449]3 years ago

6 0

Answer:

18 days

Step-by-step explanation:

3days to consume 1/2 apple

3days/ 1/2 apple or

6 days to consume 1 apple

So 6 days for 1 apple + another 6 days for another apple + one more six days for another apple = 18 days for 3 apples

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What is the equation for a line that passes through the points (8,2) and (-7,2)

TiliK225 [7]

Answer:

y = 0x + 2

Step-by-step explanation:

Find the slope.

Slope = y2 - y1

x2 - x1

Plug in the points.

Slope = 2 - 2 = 0

-7 - 8 -15

Pick a point to plug into the y = mx + b formula

I picked (8,2)

Now plug in the point and slope.

(Your teacher might prefer you to use 0/-17, but it can be simplified to 0, so I'll just use that.)

Equation: (2) = 0(8) + b

2 = 0 + b

2 = b (b = 2)

Now put your slope and the y-intercept into the equation, and it will be:

y = 0x + 2

It's a bit hard to show on keyboard, so I hope you understand.

5 0

4 years ago

Some one help me i lost with this thing

egoroff_w [7]

Answer:

Im in middle school

Step-by-step explanation: I have no clue how to help u and bc I have no idea how brainy works -_-

4 0

3 years ago

9 Find the sum of (x + 5), (-4x – 2), and (2x – 1).

s344n2d4d5 [400]

Answer: -x + 2

Step-by-step explanation:

So I assume that the question would be set up like this if you are finding the sum of all 3 terms:

(x + 5) + (-4x - 2) + (2x - 1)

1) Take out parentheses

x + 5 - 4x - 2 + 2x - 1

2) Add like terms

For the x terms:

x - 4x = -3x

-3x + 2x = -x

For the other terms:

5 - 2 = 3

3 - 1 = 2

The sum of the terms is -x + 2

7 0

3 years ago

1/4-1/8= /8-1/8=? Can you help we find the answer for this equation?

Montano1993 [528]

Answer:

Step-by-step explanation:

LCM of 4 and 8 = 8

$\dfrac{1}{4}=\dfrac{1*2}{4*2}=\dfrac{2}{8}$

$\dfrac{1}{4}-\dfrac{1}{8}=\dfrac{2}{8}-\dfrac{1}{8}\\$

$=\dfrac{1}{8}$

3 0

3 years ago

A potato was launched in the air using a potato gun. The function for the situation was h(t)=-16t^2 +100t+10, where t was the ti

Goshia [24]

Answer:

The height equation is:

h(t)=-16t^2 +100t+10

A) To find the maximum height, we must find the time where the velocity is 0, so we must derive it with respect to the time.

v(t) = -2*16*t + 100 = 0

t = 100/(2*16) = 3.125s

Now we put this time in our height equation:

h(3.125s) = -16*3.125^2 + 100*3.125 + 10 = 166.25 ft.

B) The lowest heigth of the potato will be h = 0ft, when the potato hits the ground.

C) the lowest time that works for that function is t = 0s, when the potato is fired by the gun.

D) the maximum time can be finded when the potato hits the ground, afther that point the equation does not work anymore, let's find it,

h(t) = 0 = -16t^2 +100t+10

we can solve it using Bhaskara's equation:

$t = \frac{-100 +- \sqrt{100^2 +4*16*10} }{-2*16} = \frac{-100 +- 103.2}{-32}$

So the two solutions are:

t = 6.3s

t = -0.1s

We need to chose the positive time, as we already discused that the minimum time that works for the equation is t = 0s.

so here the answer is t = 6.3s

E) the domain is 0s ≤ t ≤ 6.3s

The range is 0ft ≤ h ≤ 166.25 ft.

4 0

3 years ago