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3 years ago

Evaluate mentally. Share your strategies.

Mathematics

1 answer:

ki77a [65]3 years ago

3 0

25% of 200= 50
12% of 200= 24
8% of 200= 16
p% of 200 = ?

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egoroff_w [7]

Answer:

1.08 × 10^11

Step-by-step explanation:

Subtract: (1.8*10^11)-(7.2*10^10)

5 0

3 years ago

A triangle-shaped machine part has sides of 2 1/2 inches, 3 1/4 inches, and 5 inches. The triangle's perimeter is

SOVA2 [1]

Answer:

Step-by-step explanation:

The perimeter of any shape is the distance around the edge of the shape. It is found by adding the side lengths of each side together.

Add each side length listed for the triangle part.

$P = 2\frac{1}{2} + 3\frac{1}{4} + 5 \\P = 2\frac{2}{4} + 3\frac{1}{4} + 5\\P = 10 \frac{3}{4}$

8 0

3 years ago

Please someone explain to me how did we multiply the denominator in this

AleksandrR [38]

ok so what you wanna do is use multiplication

8 0

2 years ago

Sebastian swam laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In th

lord [1]

Answer:

$\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}$

Step-by-step explanation:

Please consider the complete question.

Sebastian swan laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In that time, he swam 1800 laps. What was his average rate in laps per hour?

Let us convert time taken into hours as:

$\text{Days}=5\times 12=60$

$\text{Minutes}=60\times 45$

1 hour = 60 minutes. To convert minutes into hours, we will divide total minutes by 60.

$\text{Hours}=\frac{60\times 45}{60}=45$

Now, we will divide 1800 by 45 to find average rate in laps per hour as:

$\text{Average rate}=\frac{\text{1800 laps}}{\text{45 hours}}$

$\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}$

Therefore, Sebastian's average rate is 40 laps per hour.

6 0

2 years ago

Write the equation of the line in fully simplified slope-intercept form.

rjkz [21]

Answer:

y=-1/2x-1

Step-by-step explanation:

8 0

2 years ago