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saveliy_v [14]
2 years ago
10

Please help this is so confusing u can have 25 points if u help me

Mathematics
1 answer:
Elina [12.6K]2 years ago
7 0

Step-by-step explanation:

Share 20pounds in the ratio 2:3

Total ratio=2+3=5

2/5×20=8

20-8=12

Sharing 20pounds in that ratio gives 8pounds:12pounds

Share 15cm in the ratio 1:3

Total ratio=1+4=4

¼×15=3.75

15-3.75=11.25

Sharing 15cm in that ratio gives 3.75:11.25

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a toy rocket is launched from the top of a 48 foot hill. The rockets initial upward velocity is 32 feet per second and its heigh
sdas [7]

Answer:

t = 2.11 seconds

Step-by-step explanation:

A toy rocket is launched from the top of a 48 foot hill. The rockets initial upward velocity is 32 feet per second and its height h at any given second t is modeled by the equation:

h=-16t^2+32t+48

Let us assume that we need to find the time by it to reach the ground. It means h = 0

-16t^2+32t+48=0

The above is a quadratic equation. The value of t is given by :

t=\dfrac{-b\pm \sqrt{b^2-2ac} }{2a}\\\\t=\dfrac{-b+ \sqrt{b^2-2ac} }{2a},\dfrac{-b- \sqrt{b^2-2ac} }{2a}\\\\t=\dfrac{-32+ \sqrt{(32)^2-2\times (-16)(8)} }{2\times (-16)},\dfrac{-32-\sqrt{(32)^{2}-2\times(-16)(8)}}{2\times(-16)}\\\\t=-0.11\ s, 2.11\ s

So, it will take 2.11 seconds to reach the ground.

6 0
3 years ago
Help me with this :))))))
ollegr [7]

Answer:

CE = 21.2

Step-by-step explanation:

CE = CD + DE = 14 + 7.2 = 21.2

7 0
3 years ago
Answers: <br> A.5<br> B.9<br> C.10<br> D.13<br> Need the answer ASAP
maw [93]

Answer:

<u>x = 5</u>

Step-by-step explanation:

See attached image.

8 0
2 years ago
What is the equation of the line that passes between (-1, -7) and has a slope of 2
cricket20 [7]

Answer:

y = 2x - 5

Step-by-step explanation:

3 0
3 years ago
Nancy created a graph to predict the pay she will take home after taxes are taken from her income. Using the information on the
deff fn [24]
The answer is c. 0.8

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3 years ago
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