3 years ago

16 POINTSS!! HELPPPP The graph shows the cost per day of electricity over a seven-day period.

Mathematics

1 answer:

Vsevolod [243]3 years ago

8 0

It would be positive correlation, in the picture included you'll see what should positive correlation look like.

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A car completes a journey at an average speed of 40km/h.At what speed must it travel on the return journey if the average speed

nalin [4]

The distance, s = 40t₁ where t₁ is the time to complete the outward journey.
The same distance = vt₂ where t₂ is the time to complete the return journey at speed v.
For the whole journey, 2s=60(t₁+t₂). Therefore s=30(t₁+t₂)=40t₁=vt₂.
30t₁+30t₂=40t₁, 10t₁=30t₂, t₁=3t₂, so s=120t₂=vt₂ and v=120kph.

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3 years ago

Simplify:<br> The square root of p squared

Evgen [1.6K]

Answer:

$p$

Step-by-step explanation:

$\sqrt{p^2} = p$

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3 years ago

Select the statement that is true. Group of answer choices There are integers s and t such that 2=102⋅s+72⋅t . here are integers

LekaFEV [45]

Answer:

Step-by-step explanation: true

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3 years ago

2.<br> If y = V9 – 3x, determine the value of x for which y will be a real number.

Pepsi [2]

Answer:

x ≤ 3

Step-by-step explanation:

The expression inside the radical ≥ 0, thus

solve

9 - 3x ≥ 0 ( subtract 9 from both sides )

- 3x ≥ - 9

Divide both sides by - 3, reversing the symol as a result of dividing by a negative quantity

x ≤ 3

Any value of x less than or equal to 3 ensures $\sqrt{9-3x}$ is real

8 0

3 years ago

A salesman earns 8% commission on all the merchandise that he sells. Last month he sold $6000 worth of merchandise. How much com

REY [17]

$480

First convert 8% into a decimal
8%/100=0.08

Multiply the decimal by his sales
0.08*6000
480
He made $480 in commission last month

Hope this helped! :)

4 0

3 years ago