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Lelu [443]
3 years ago
10

Multiplication scale

Mathematics
1 answer:
DerKrebs [107]3 years ago
8 0

Answer:

here is a multiplication scale

Step-by-step explanation:

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Hence, the equation for the question (7) is n + 19 = 84 and equation for (8) is 3n = 12. It can be solved by linear equation in one variable.

What is a linear equation in one variable?

A linear equation in one variable is written as ax+b = 0. Here, a and b are constants and x is a variable.

(7)

Consider n number of baseball cards does Mike have. Since this is 19 less then the cards Allan have hence, as you add 19 in n then it will give 84.

n + 19 = 84

(8)

Consider the speed of Michelle is n. As, it is 3 times less than the speed of the Jamie hence, it you multiply 3 with n then it will give 12.

    3n = 12

Hence, the equation for the question (7) is n + 19 = 84 and equation for (8) is 3n = 12.

Learn more about linear equation in one variable from the following link:

brainly.com/question/85774

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1 year ago
Which expressions are equal to 0 when x = -1? Check all that apply.
Sphinxa [80]

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A C and E

Step-by-step explanation:

6 0
3 years ago
Cos²(90° -X).tan(180°-X).cos(180°+X)/sin(180°-X)
Naya [18.7K]

Recall some identities:

tan(x) = sin(x) / cos(x)

cos(x + y) = cos(x) cos(y) - sin(x) sin(y)

cos(x - y) = cos(x) cos(y) + sin(x) sin(y)

sin(x - y) = sin(x) cos(y) - cos(x) sin(y)

This means we have

• cos²(90° - x) = [cos(90°) cos(x) + sin(90°) sin(x)]²

… = sin²(x)

• tan(180° - x) = sin(180° - x) / cos(180° - x)

… = [sin(180°) cos(x) - cos(180°) sin(x)] / [cos(180°) cos(x) + sin(180°) sin(x)]

… = sin(x) / (-cos(x))

… = -tan(x)

(and we also get sin(180° - x) = sin(x))

• cos(180° + x) = cos(180°) cos(x) - sin(180°) sin(x)

… = -cos(x)

So, the given expression reduces to

sin²(x) (-tan(x)) (-cos(x)) / sin(x) = sin²(x)

since tan(x) and cos(x)/sin(x) = 1/tan(x) will cancel.

3 0
3 years ago
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