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2 years ago

Show work and Evaluate 3/4 + 2/5

Mathematics

1 answer:

frez [133]2 years ago

5 0

Answer:

23/20

Step-by-step explanation:

Find the common denominator of the 2 fractions (It's 20):

3/4 + 2/5

Multiply both numerator and denominator by 5 for the first fraction and multiply by 4 for the second fraction:

15/20 + 8/20

Add the fractions together:

23/20

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Which expression is equivalent to the one below?

Citrus2011 [14]

Answer:

B. $5*\frac{1}{7}$

Step-by-step explanation:

5÷7 is also $\frac{5}{7}$ --that divided sign is what the fractional bar represents in a fraction.

now multiply $5*\frac{1}{7}=\frac{5}{1}*\frac{1}{7}=\frac{5*1}{1*7}=\frac{5}{7}$

both are the same result, so your answer is Choice B.

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2 years ago

According to the National Oceanic and Atmospheric Administration, the blue whale is the largest animal on Earth. Blue whales wei

Ugo [173]

Answer:

According to the passage, whales weight 300,000 pounds on average. Narwhales weigh 2,000 pounds on average.

Step-by-step explanation:

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This is what we call scientific notation. You could solve it normally, or you could use a faster method.

Scientific notation states that the first number that you see, the three, is the first part of the answer. The exponent on the number of zero's that there is.

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Let's do the same thing to Narwhales.

2× $10^{3}$ is 2,000.

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Naily [24]

Answer:

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Step-by-step explanation:

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In △ABC, ∠ABC = 60○

Temka [501]

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