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azamat
3 years ago
14

How to do this right im confused

Mathematics
1 answer:
Leokris [45]3 years ago
6 0

hi, i wrote down the correct way how to do the formula for questions 5 and 8... im really sorry but i dont really know to explain step by step over just writing so you can just look at the pictures and take whatever you can from them. good luck

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Issac tosses a quarter off of a bridge, creating the shape of a parabola. The parabola can be represented by the equation h=-16t
Wittaler [7]

Answer:

c) 18 units

d) 1 second

Step-by-step explanation:

h = -16t² - 4t + 20

c) t = 0.25

h = -16(0.25)² - 4(0.25) + 20

h = 18

d) -16t² - 4t + 20 = 0

4t² + t - 5 = 0

4t² + 5t - 4t - 5 = 0

t(4t + 5) - (4t + 5) = 9

(4t + 5)(t - 1) = 0

t = -1.25, 1

t = 1 second

5 0
3 years ago
During a school lunch, the cafeteria sold two-fifths as many white milks as chocolate milks. If there were 35 milks sold, how ma
anyanavicka [17]
Hello!

As we can see, they sell 2/5 as many white milks and chocolate milks. We can write this as the ratio 2:5. As you can see, we are given the total, which is 35. The total of the ratio in simplest form is 7 (2+5). As you can see, we have to multiply by 5 to get that 7 to 35. Therefore we multiply each part of the ratio by 5 to get our final answer. We can have w represent the white milks while c represents the chocolate milks.

\frac{w}{c} =  \frac{2}{5}·\frac{5}{5}=\frac{10}{25}

Therefore there were 25 chocolate milks sold (just to verify 10 is 2/5 of 25).

I hope this helps!

3 0
3 years ago
Martin has some dollar notes. 20% of the notes are si
hjlf

Answer:

easy

Step-by-step explanation:

6 0
3 years ago
What is the value of b? <br> Answer options: 100, 55, 110, 90
Ipatiy [6.2K]

Answer:

100

Step-by-step explanation:

55+45=100

7 0
2 years ago
Solve 3x+k=c for x
sasho [114]

Answer:  x=(c-k) over 3

Step-by-step explanation:Here we are given the equation 3x+k =c

Here in order to solve for x , first let us bring k to the right side.

k is in addition on the left , so when we bring it to the right it gets subtracted

now we have to isolate x on the left side , 3 is in multiplication with x , so when we bring it to the right side we divide by 3

Answer=x=(c-k) over 3

4 0
3 years ago
Read 2 more answers
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