2 years ago

Simplify. (6+)(-7+7) Write your answer in the form a+b.

Mathematics

1 answer:

TEA [102]2 years ago

7 0

Step-by-step explanation:

6×(-7+7)

multiply each number in bracket by 6

(-42+42)

sum up whats left

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3 years ago

the NACI cafeteria wants to sell two 25 cm diameter medium size pizzas for the same price as one large pizza. what should the di

Alex777 [14]

Answer:

35.34 centimeters

Step-by-step explanation:

The amount of pizza is same as the area. The pizza is in a shape of a circle. The area of a circle is:

$A=\pi r^2$

Where

r is the radius (half of diameter)

Area of one medium size pizza is (diameter 25 means radius is 25/2 = 12.5):

$A=\pi r^2\\A=\pi (12.5)^2\\A=490.87$

So, area of two of these medium size pizzas is:

490.87 * 2 = 981.74

This should be the area of the large pizza. We can find the radius of that by substituting into formula. Shown below:

$A=\pi r^2\\981.75=\pi r^2\\r=\sqrt{\frac{981.74}{\pi}} \\r=17.67$

Hence, the diameter would be around:

17.67 * 2 = 35.34 centimeters

5 0

3 years ago

Last year, a factory produced 126 widgets per day. After retooling, production increased to 189 widgets per day. What was the pe

lys-0071 [83]

<h3>Answer: 50%</h3>

Work Shown:

change = new - old = 189-126 = 63

percent increase = (change/old)*100%

percent increase = (63/126)*100%

percent increase = (0.50)*100%

percent increase = 50%

50% of 126 = 0.50*126 = 63

126+63 = 189

The answer is confirmed.

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2 years ago

Write the name of the period that has the digits 486

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3 years ago

The tires of a tractor are 4.5 feet tall. How many 360-degree rotations do the tires make when the tractor travels 170 feet? Rou

Arturiano [62]

Answer:

170÷(4.5×2×3.14)=170÷28.26=6

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2 years ago

Read 2 more answers