2 years ago

The sum of the ages of Martin and his son Sherwin is 47 years. Martin's age is 2 years more than 4 times the

Mathematics

1 answer:

aliina [53]2 years ago

7 0

Answer:

In the picture above it shows how to answer the questions step by step. If there's a mistake, pls inform me.

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Find S18 for geometric series given a5=-6 and a2= -48

Ganezh [65]

an = a1r^(n-1)

a5 = a1 r^(5-1)

-6 =a1 r^4

a2 = a1 r^(2-1)

-48 = a1 r

divide

-6 =a1 r^4

---------------- yields 1/8 = r^3 take the cube root or each side

-48 = a1 r 1/2 = r

an = a1r^(n-1)

an = a1 (1/2)^ (n-1)

-48 = a1 (1/2) ^1

divide by 1/2

-96 = a1

an = -96 (1/2)^ (n-1)

the sum

Sn = a1[(r^n - 1/(r - 1)]

S18 = -96 [( (1/2) ^17 -1/ (1/2 -1)]

=-96 [ (1/2) ^ 17 -1 /-1/2]

= 192 * [-131071/131072]

approximately -192

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3 years ago

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vlada-n [284]

Answer:

132, 390, 244, 492

Step-by-step explanation:

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Determine if y=-2x-7 and -y=2x+13 are parallel, perpendicular, coincide or none of these

Goryan [66]

If you move the negative on the left side of the second equation over to the right side, then we can see that the equation is equivalent to $y={-2x} - 13$ .

Remember that an equation $y = mx + b$ represents a line with slope $m$ and y-intercept $b$ . Since both equations given have a slope of -2, but have different y-intercepts, they are parallel.

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2 years ago

What expression is equivalent to 5(a + a + a )

Alecsey [184]

Answer:

15a

Step-by-step explanation:

Because 5(a + a + a) = 5 * (3a) = 15a

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On October 1, 2017, Wildhorse Co. places a new asset into service. The cost of the asset is $92000 with an estimated 5-year life

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.....................

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