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3 years ago

Which of the following groups of numbers are all prime numbers? A. 3, 11, 23, 31 B. 2, 3, 5, 9 C. 2, 5, 15, 19 D. 7, 17, 29, 49

Mathematics

2 answers:

puteri [66]3 years ago

6 0

I think it is A. or D

Mekhanik [1.2K]3 years ago

3 0

A because 9 is not prime in answer B, 15 is not prime in answer C, and 49 is not prime in answer D. So the correct answer is A.

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A rectangular swimming pool is 19 meters long, 11 1/2 meters wide, and 1 1/2 meters deep. What is its volume?

4vir4ik [10]

Answer:

$327\frac{3}{4}$

Step-by-step explanation:

→ State the volume of a rectangular prism

Length × Width × Height

→ Substitute in the numbers

$19*11\frac{1}{2} *1\frac{1}{2}$

→ Convert to improper fractions

$\frac{19}{1} *\frac{23}{2} *\frac{3}{2}$

→ Multiply

$\frac{1311}{4}$

→ Convert to mixed fraction

$327\frac{3}{4}$

6 0

1 year ago

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perimeter of parallelogram 140 cm if one side is longer than the other by 10cm, find the length of each of its parallel side

Verizon [17]

The length of each of its parallel side are 30 cm and 40 cm.

<u>Step-by-step explanation</u>:

Perimeter of parallelogram = 140 cm.
The one side of parallelogram = x cm.
The other side of parallelogram = x+10 cm.

Perimeter of a parallelogram = 2 (base+height)

⇒ 140 = 2(x+x+10)

⇒ 140 = 2(2x+10)

⇒ 140 = 4x+20

⇒ 4x = 120

⇒ x = 120/4

x = 30 cm

∴ The longer side = 30+10 = 40 cm

4 0

3 years ago

use the circle graph show below to answer the question a pie chart labeled favorite sports to watch is divided into into three p

mart [117]

From the pie chart described, the percent of people that responded that football was their favorite sport to watch is 42% which represents 210 of the people surveyed.

Let the number of people surveyed be x, then

$42%\ of\ x=210 \\ \\ \Rightarrow0.42x=210 \\ \\ \Rightarrow x= \frac{210}{0.42} =500$

Therefore, the number of people surveyed is 500 people.

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3 years ago

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san4es73 [151]

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2 years ago

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aliina [53]

121 is the area of the square

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3 years ago

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