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Advocard [28]
3 years ago
14

Someone help plssssss

Mathematics
1 answer:
Vadim26 [7]3 years ago
5 0

Answer:

a is 9

b is 77

Step-by-step explanation:

Give me brainllest

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Simplify: 1/3(6ab-9b)+2/3(9ab+12)
tangare [24]
Not sure how simplified you need it...

8ab-3b+8
6 0
3 years ago
The first part of a trip driving at 40 mph was 15 miles longer and took 30 minutes longer than the second part of the trip drivi
kenny6666 [7]

Answer:

65 miles

Step-by-step explanation:

There are two simultaneous equations . Remeber that v=d/t, 1hour = 60 minutes.

1. 40 = (d+15)/(t+0.5)

2. 50 = d/t

solving: d= 25 miles and t=0.5 hours.

The distance traveled is:

D=d+d+15

D=65 miles

5 0
3 years ago
Read 2 more answers
Which term describes the dotted line in the quadrilateral?
Tasya [4]
The correct answer is C diagonal
7 0
3 years ago
The National Cancer Institute estimates that 3.65% of women in their 60s get breast cancer. A mammogram can typically identify c
masha68 [24]

Answer:

39.17% probability that a woman in her 60s who has a positive test actually has breast cancer

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Positive test.

Event B: Having breast cancer.

3.65% of women in their 60s get breast cancer

This means that P(B) = 0.0365

A mammogram can typically identify correctly 85% of cancer cases

This means that P(A|B) = 0.85

Probability of a positive test.

85% of 3.65% and 100-95 = 5% of 100-3.65 = 96.35%. So

P(A) = 0.85*0.0365 + 0.05*0.9635 = 0.0792

What is the probability that a woman in her 60s who has a positive test actually has breast cancer?

P(B|A) = \frac{0.0365*0.85}{0.0792} = 0.3917

39.17% probability that a woman in her 60s who has a positive test actually has breast cancer

7 0
3 years ago
Solve the inequality for y.<br> 8x – 7y &lt; -35
laila [671]

Answer:

y = 8/7x + 5

Step-by-step explanation:

8x - 7y = -35

8x +35= 7y

8/7x + 5 = y

8 0
3 years ago
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