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3 years ago

Don’t understand, need help

Mathematics

1 answer:

just olya [345]3 years ago

3 0

Answer:

Step-by-step explanation:

30 x 3 90

30 x 2 60

30 x 1 30

90+60+30

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8. A number is of another number. The difference of the numbers is 18. (Assume that you are subtracting the

bezimeni [28]

Answer:

Step-by-step explanation:

"A number is [WHAT?] of another number." It appears the WHAT?? is missing. If it is a word such as "twice," it can be solved in this fashion.

Let the numbers be X and Y, with Y the larger number.

A number is twice another number: Y = 2X

The difference of the numbers is 18: Y - X = 18

Use the first equation (Y = 2X) in the second by replacing "Y" with (2X):

Y - X = 18

2X - X = 18

X = 18

Y = 2X, so Y = 36

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3 years ago

What is -3.7 + 2.8 equal too

Ber [7]

Answer:

-0.9

Step-by-step explanation

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3 years ago

Find all solutions of each equation on the interval 0 ≤ x<2π.

Aleksandr [31]

Answer:

$x = 0 \: or \:x = \pi$

Step-by-step explanation:

The given equation is

$\tan^{2} (x) \sec^{2} (x) + \sec^{2} (x) - \tan^{2} (x) = 2$

Subtract 2 from both sides and factor by grouping to get:

$\sec^{2} (x)(\tan^{2} (x) + 2) -1( \tan^{2} (x) + 2)$

$(\tan^{2} (x) + 2) (\sec^{2} (x) - 1) = 0$

By the zero product principle:

$(\tan^{2} (x) + 2) = 0 \: or \: (\sec^{2} (x) - 1) = 0$

$(\tan^{2} (x) = - 2 \: or \: \sec^{2} (x) = 1$

When

$\sec^{2} (x) = 1 \implies\cos^{2} (x) = 1$

$\implies \: \cos(x) = \pm1$

This implies

$x = 0 \: or \:x = \pi$

When

${ \tan }^{2} (x) = - 2$

We have

$\tan(x) = \pm \sqrt{ - 2}$

hence x is not defined for all real numbers

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3 years ago

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Find the area and perimeter of the parallelogram 36in 40in

Misha Larkins [42]

Answer:

perimeter= 152in

Step-by-step explanation:

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4 years ago

Solve least to greatest 5/9,1/3,8/16,1/4

Fittoniya [83]

Answer:

1/4,1/3,8/16,5/9

Step-by-step explanation:

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3 years ago