3 years ago

Help please due sooonnnnnn

Mathematics

1 answer:

anastassius [24]3 years ago

5 0

Answer:

A i believe

Step-by-step explanation:

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The sum of three times the square of a number and -7

Ganezh [65]

Answer:

3x² - 7

Step-by-step explanation:

3 times (number squared) and sum with (-7)

3 times x² and add (-7)

3x² + (-7)

3x² - 7

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2 years ago

A ratio is a comparison of two numbers by addition.<br><br> always<br> sometimes<br> never

solong [7]

The answer would be the Third Option, "Never".

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An 8-sided die is formed when two square pyramids are attached by their bases. The perimeter of the base shape is 6 centimeters.

lawyer [7]

Answer:

7.5cm²

Complete question:What is the surface area of the 8-sided figure?

Step-by-step explanation:

Consider the half of the 8-sided die i.e the pyramid ABCDE:

As the base is 6 of the perimeter, so each side of the base is 6/4=3/2

Now, the distance between the tallest points is 2 cm, so the height of Pyramid ABCDE is 1 cm.

Considering the right triangle EOM:

EO=1, OM= 3/4 (it is half of AB=3/2) and EM is the hypothenuse, so by the pythagorean theorem length of EM is

$\sqrt{1+ ( \frac{3}{4} )^{2} }= \sqrt{1+ \frac{9}{16} }= \sqrt{ \frac{25}{16} }= \frac{5}{4} (cm)$

5. So side EBC has area

$\frac{1}{2}BC*EM= \frac{1}{2}* \frac{3}{2}* \frac{5}{4}= \frac{15}{16}$

6. The total area is 8*Area(EBC)= $8* \frac{15}{16}= \frac{15}{2}=7.5 ( cm^{2} )$

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3 years ago

Which expression shows the results of applying the distributive property to 3 (1/5x- 1/7)

marshall27 [118]

The first option: (3/5)x - 3/6

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Which of the following are equivalent to -7?

Scilla [17]

49/-7 and -21/3 are the only two equivalent to -7

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