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2 years ago

Suppose you earned 8t-3 on monday and 6t+5 dollars on tuesday. what were your total earnings? simplify your answer

1 answer:

Nadusha1986 [10]2 years ago

6 0

Let
A=8t-3
B=6t+5

we know that
total earnings=A+B
so
total earnings=(8t-3)+(6t+5)------> (8t+6t)+(-3+5)------> (14t+2) dollars

the answer is
(14t+2) dollars

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2 years ago

There are 12 red marbles and 8 green marbles in a bag. What is the probability of selecting a red

madam [21]

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The probability of selecting a red marble, not replacing it, and then selecting a green marble from the bag is 24/95

Step-by-step explanation:

Number of red marbles = 12

Number of green marbles = 8

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Probability of selecting red marble = $\frac{12}{20}$

Since it is the case of no replacement

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3 years ago

A car is on a driveway that is inclined 10 degrees to the horizontal. A force of 490 lb is required to keep the car from rolling

lara31 [8.8K]

Answer:

a) weight of the car = 2816,1 lbs

b) 2773 lbs

Step-by-step explanation:

The equilibrium force is 490 lbs. That force keep the car at rest, then

∑ Fy = 0 and ∑Fx = 0

Forces acting on the car:

The external force 490 lbs

weight of the car uknown

Normal force

sin∠10° = 0,174

cos∠10° = 0.985

∑Fx = 0 mg*sin10°- 490 = 0 ∑Fy = 0 mg*cos10° - N = 0

mg*0,174= 490

mg = 490 / 0,174

mg = 2816,1 lbs

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The Normal force

mg*cos10° - N = 0 2816,1 * 0,985 = N

N = 2773 lbs

Then equal force in magnitude and in opposite direction will car exets on the driveway

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3 years ago