4 years ago

Help me with these please!!

Mathematics

1 answer:

Aliun [14]4 years ago

8 0

7x + 5y > = 280 (thats greater then or equal)

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I need major help idek what this is

natka813 [3]

Answer:

2772 I think I don't really know .w.

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3 years ago

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A batch of 40 parts contains six defects. If two parts are drawn randomly one at a time without replacement, what is the probabi

adell [148]

Answer:

a) Therefore, the probability is P=1/52.

b) Therefore, the probability is P=9/400.

Step-by-step explanation:

We know that a batch of 40 parts contains six defects.

a) We calculate the probability that the both parts are defective, if two parts are drawn randomly one at a time without replacement.

The probability for the first is 6/40.

The probability for the second is 5/39.

We get:

$P=\frac{6}{40}\cdot \frac{5}{39}\\\\P=\frac{1}{52}$

Therefore, the probability is P=1/52.

b) We calculate the probability that the both parts are defective, if two parts are drawn randomly one at a time with replacement.

The probability for the first is 6/40.

The probability for the second is 6/40.

We get:

$P=\frac{6}{40}\cdot \frac{6}{40}\\\\P=\frac{9}{400}$

Therefore, the probability is P=9/400.

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3 years ago

What is the ratio of dimes to pennies in a dollar

maw [93]

Well, there are 100 pennies in a dollar, and 10 dimes in a dollar. So, the ratio could be 10:100, or 1:10.

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3 years ago

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The original value of a car Is $15,000 and it depreciates (loses value) by 20% each year what is the value of the car after thre

Sergeeva-Olga [200]

This is an exponential decay function of the form:

y=ab^x, In this case:

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y=$7680

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Given f(x) =5 - 3x, if f(x) = -19, find x

solong [7]

5 - 3x = -19
-3x = -24
Divide by -3
Solution: x = 8

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3 years ago