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Vinil7 [7]
2 years ago
15

7b-2/5=6b-7/5 Solve for b

Mathematics
1 answer:
Wewaii [24]2 years ago
7 0

Answer:

b=-1

Step-by-step explanation:

7b-2/5=6b-7/5

7b+1=6b

-b=1

b=-1

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What is the equal value of 2⁷​
Andreas93 [3]

Answer:

128

Step-by-step explanation:

2 to the power of 7 means you multiply 2 seven times over

2*2*2*2*2*2*2 = 4*2*2*2*2*2= 8*2*2*2*2= 16*2*2*2= 32*2*2= 64*2 = 128

plz give brainliest

8 0
3 years ago
3. A teacher made a copy of a map. To make the map easier to see, the teacher enlarged the area of the map by 38%. Let d represe
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Answer:

1.38d

Step-by-step explanation:

4 0
3 years ago
90 hazelnuts have a mass of 125 g. Hazelnuts have 630 calories per 100 g. work out the number of calories per hazelnut
jenyasd209 [6]

90 hazelnuts = 125g

Therefore, the mass of one hazelnut is this...

90 / 90 = 125 / 90

1 hazelnut = 25/18 grams


630 calories = 100 grams

100 divided by 25/18 = 72

Therefore...

630 / 72 = 1 hazelnut

AND THE ANSWER IS

8.75 calories = 1 hazelnut

8 0
4 years ago
Read 2 more answers
Lisa has collected data to find that the number of pages per book on a book shelf has a normal distribution. What is the probabi
aev [14]

Answer:

2.5% probability that a randomly selected book has fewer than 133 pages.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 189 pages

Standard deviation = 28 pages

What is the probability that a randomly selected book has fewer than 133 pages?

133 = 189 - 2*28

So 133 is two standard deviations below the mean.

The Empirical Rule states that 95% of the measures are within 2 standard deviations of the mean. The other 5% is more than two standard deviations distant from the mean. The normal distribution is symmetric, which means that of those 5%, 2.5% are more than 2 standard deviations below the mean and 2.5% are more than 2 standard deviations above the mean.

This means that there is a 2.5% probability that a randomly selected book has fewer than 133 pages.

3 0
3 years ago
Pls do all of them... :) (it’s so rude and annoying sometimes to bcuz I help ppl when they don’t help me for once...pls help me
Genrish500 [490]

Answer:

1A: 12

Step-by-step explanation:

2A: 16

3A: 21.333

4A: 13

5A: 14

1B: 15

2B: 12

3B:29

4B: 11

5B: 24

6 0
3 years ago
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