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3 years ago

2020-21

Mathematics

1 answer:

Dvinal [7]3 years ago

5 0

Answer: Brain paid $ 45.5 for the jacket.

Step-by-step explanation:

Given: Original price of jacket = $ 65

Discount -= 30%

Price after discount = Original price - 30% of Original price

= 65 - 30% of 65

= 65 - (0.3) x 65 [30% = 0.3]

= (65) (1-0.3 ) [Taking 65 common]

= (65)(0.7)

= $ 45.5

Hence, Brain paid $ 45.5 for the jacket.

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A group of 25 people are going to run a race. The top 8 finishers advance to the finals. Determine the number of possible outcom

satela [25.4K]

Answer:

n[total]=25

n[top finishers]=8

the number of possible outcome

= $\frac{25 \times 24 \times 23 \times 22 \times 21 \times 20 \times 19 \times 18}{8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1} = 1081575$ outcomes

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3 years ago

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Maria is draining her hot tub at a rate of 5.5 gallons per minute. Is the amount of water left in the pool a function of the amo

AleksandrR [38]

The amount of water in the pool after t minutes is modeled by the linear function $V(t) = V(0) - 5t$ , hence it is a function of time.

A <em>linear function</em> for the amount of water in the pool, considering that it is <u>drained at a rate of a gallons per minute</u>, is modeled by:

$V(t) = V(0) - at$

In which V(0) is the initial volume.

In this problem, draining her hot tub at a rate of <u>5.5 gallons per minute</u>, hence $a = 5.5$ , and:

$V(t) = V(0) = 5.5t$

Which is a function of time.

To learn more about linear functions, you can take a look at brainly.com/question/13488309

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2 years ago

Consider the system:

PolarNik [594]

Answer:

An exponent value in a would make the system inconsistent because it will either gain or lose height over time.

Any real number without an exponent value will make the system consitent.

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Please help:<br> In Δ ABC, sin A= 77, sin C= 23, and c =16, find the length of A.

Dafna1 [17]

Answer:

39.9

Step-by-step explanation:

a/sinA = c/sinC

a/sin(77) = 16/sin(23)

a = sin(77) × 16/sin(23)

a = 39.89935764