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2 years ago

8th grade khan academy

Mathematics

1 answer:

satela [25.4K]2 years ago

4 0

Answer:

d = 11t - 20

Step-by-step explanation:

Hope it helps and have a great day! =D

~sunshine~

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Raul is making chocolate chip pancakes. The number of chocolate chips he uses is proportional to how many ounces of mix he makes

Gemiola [76]

Answer:

12 = 5k/2

24 = 5k

Step-by-step explanation:

Raul is making chocolate chip pancakes.

The number of chocolate chips he uses is proportional to how many ounces of mix he makes.

Hence,

Chocolate chips ∝ Number of Ounces

Chocolate chips = c

Number of Ounces = m

= cm

c = km

Where k = Constant of Proportionality

The recipe said that for every 2 1/2 ounces of the mix, 12 chocolate chips be added.

Hence

12 = 21/2 × k

12 = 5/2 × k

12 = 5k/2

Cross multiply

12 × 2 = 5k

24 = 5k

The equation that represents the relationship between c the number of chocolate chips and m the number of ounces is

12 = 5k/2

24 = 5k

8 0

2 years ago

3+x/3=x/2<br> answer and the steps please

AveGali [126]

Answer:

x = 18

Step-by-step explanation:

Given

3 + $\frac{x}{3}$ = $\frac{x}{2}$

Multiply through by the LCM of 2 and 3 to clear the fractions.

The LCM of 2 and 3 is 6, thus

18 + 2x = 3x ( subtract 2x from both sides )

18 = x

3 0

2 years ago

51.03 is 88% of what number

Tcecarenko [31]

I would use a proportion

51.03/88% = x/100%

Which is saying: if 51.03 is 88% of the number, what is 100% of the number

Cross multiply to get x=57.99

5 0

2 years ago

PLS HELP ME AS SOON AS POSSIBLE

Veseljchak [2.6K]

Answer:

7a. D)

7b. $78

Step-by-step explanation:

7a: We're given the information that there's a daily fee of $50 and $0.35 per mile driven, which is m. We can write "$0.35 per mile driven" as 0.35m. Then, the total amount of money it costs represented as an expression is 50 + 0.35m, thus, making it answer D).

7b: In this problem, we have to take our previous expression 50 + 0.35m, plug in the value of m, and simplify.