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3 years ago

Determine whether each of the following are functions

Mathematics

1 answer:

Alja [10]3 years ago

7 0

Answer:

xxc

Step-by-step explanation:

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If 7 people ride a roller coaster 5 times and it is $3 per person pre ride what is the total price they paid for the rides

koban [17]

If 7 people paid $3 per ride and road 5 times, it would be $21 dollars. You could do it 3×5=15+7=21

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3 years ago

Can any one answer this correctly?

MakcuM [25]

Answer:

Step-by-step explanation:

The Y-intercept is -3.

The gradient is -3/4 since it goes down 3 every 4 tiles.

7 0

2 years ago

Read 2 more answers

Two workers finished a job in 12 days. How long would it take each worker to do the job by himself if one of the workers needs 1

Lorico [155]

Two workers finished a job in 7.5 days.

How long would it take each worker to do the job by himself if one of the workers needs 8 more days to finish the job than the other worker?

let t = time required by one worker to complete the job alone

then

(t+8) = time required by the other worker (shirker)

let the completed job = 1

A typical shared work equation

7.5%2Ft + 7.5%2F%28%28t%2B8%29%29 = 1

multiply by t(t+8), cancel the denominators, and you have

7.5(t+8) + 7.5t = t(t+8)

7.5t + 60 + 7.5t = t^2 + 8t

15t + 60 = t^2 + 8t

form a quadratic equation on the right

0 = t^2 + 8t - 15t - 60

t^2 - 7t - 60 = 0

Factor easily to

(t-12) (t+5) = 0

the positive solution is all we want here

t = 12 days, the first guy working alone

then

the shirker would struggle thru the job in 20 days.

8 0

3 years ago

Read 2 more answers

The state of Colorado has roughly the shape of a rectangle that is 3.8 x 102 miles long and 2.8 x 102 miles high. What is the ap

Illusion [34]

104,185 miles is the area of Colorado

6 0

3 years ago

Solving Exponential and Logarithmic Equation In exercise,solve for x or t.See example 5 and 6.

Aloiza [94]

Answer:

0.70275

Step-by-step explanation:

Data provided in the question:

4e²ˣ⁻¹ -1 = 5

now solving for 'x'

⇒ 4e²ˣ⁻¹ = 5 + 1

⇒ 4e²ˣ⁻¹ = 6

⇒ $e^{(2x-1)} =\frac{6}{4}$

⇒ $e^{(2x-1)} =\frac{3}{2}$

now,

taking natural log both sides, we get

⇒ 2x - 1 = $\ln(\frac{3}{2})$

also,

we know

⇒ $\log(\frac{A}{B}) = \log(A)+\log(B)$

thus,

⇒ 2x - 1 = ln(3) - ln(2)

⇒ 2x - 1 = 1.0986 - 0.6931

⇒ 2x - 1 = 0.4055

⇒ 2x = 0.4055 + 1

⇒ 2x = 1.4055

⇒ x = 0.70275

3 0

3 years ago