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Temka [501]
3 years ago
7

NEED ANSWER ASAP!! Find x

Mathematics
1 answer:
sineoko [7]3 years ago
6 0

Step-by-step explanation:

\frac{48}{2x + 7}  =  \frac{40}{5x - 2}  \\ 48(5x - 2) = 40(2x + 7) \\ 240x - 96 = 80x + 280 \\ 240x - 80x = 96 + 280 \\ 160x = 376 \\  \frac{160x}{160}  =  \frac{376}{160}  \\ x = 2.35

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I need help with this question. Melissa is baking a birthday cake for her best friend and the preparation time is 12 minutes, wh
Otrada [13]

Answer:

I put all the steps down. I don't know which one you want. I hope you understand it now.

Step-by-step explanation:

b = baking time

p = preperation time

p = 1/3b

12 = 1/3b

b = 12*3

b = 36 minutes

5 0
2 years ago
. You got 46 out of 65 questions right on your exam. What's your grade?
larisa86 [58]

Answer:

about like 8 /10

Step-by-step explanation:

8 0
2 years ago
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C6H12O2 + O2 --> 6H2O + 6CO2 + 2800 kJ
DIA [1.3K]

Answer:

This is the equation for cellular respiration.

Step-by-step explanation:

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3 0
2 years ago
Find the value of each trigonometric ratio.
Tasya [4]

Answer: 40/41

Step-by-step explanation:

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4 0
3 years ago
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3. From the table below, find Prof. Xin expected value of lateness. (5 points) Lateness P(Lateness) On Time 4/5 1 Hour Late 1/10
wariber [46]

Answer:

The expected value of lateness \frac{7}{20} hours.

Step-by-step explanation:

The probability distribution of lateness is as follows:

  Lateness             P (Lateness)

  On Time                     4/5

1 Hour Late                  1/10

2 Hours Late                1/20

3 Hours Late                1/20​

The formula of expected value of a random variable is:

E(X)=\sum x\cdot P(X=x)

Compute the expected value of lateness as follows:

E(X)=\sum x\cdot P(X=x)

         =(0\times \frac{4}{5})+(1\times \frac{1}{10})+(2\times \frac{1}{20})+(3\times \frac{1}{20})\\\\=0+\frac{1}{10}+\frac{1}{10}+\frac{3}{20}\\\\=\frac{2+2+3}{20}\\\\=\frac{7}{20}

Thus, the expected value of lateness \frac{7}{20} hours.

8 0
2 years ago
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