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Sedaia [141]
3 years ago
5

Help me fast i have a hw......

Mathematics
1 answer:
shtirl [24]3 years ago
7 0

Answer:

7.c

8.g

16.f

17.a

Step-by-step explanation:

hope it helps

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A researcher investigates whether there is a relationship between hours of sleep and memory for photographs. The researcher assi
ehidna [41]

Answer:

It is the experimental condition.

Step-by-step explanation:

In the experiment given in the question, the amount of sleep is the independent variable and the number of photographs they remember is the dependent variable because it depends on the amount of sleep.

The 8 hours of sleep, which creates the difference in the experiment between the control group and the test group, is the experimental condition.

The experimental condition is the variable that is changed to let the researcher observe the effects on the dependent variable.

I hope this answer helps.

8 0
3 years ago
Read 2 more answers
How many times can a 40-gallon barrel be filled from 5 casks, each holding 120 gallons?
Mariulka [41]

Answer:

It can be filled 15 times

Step-by-step explanation:

If 5 casks hold 120 gallons each,

5x120= 600

To find how many times a 40gallon barrel can be filled,

= 600/40

= 15

This means a 40 gallon barrel will be filled 15 times.

6 0
3 years ago
Read 2 more answers
How many oxygen atoms are in the product H2O+ CO2
Zielflug [23.3K]
For CO2 there is one atom of carbon and two atoms of oxygen. For H2O, there is one atom of oxygen and two atoms of hydrogen.
7 0
3 years ago
You and Mr. Fowles have decided to race each other at the Boston Marathon (26 miles long). Mr. Fowles runs at a steady 4.2 miles
Maslowich

Answer:

The answer is below

Step-by-step explanation:

Speed is the time rate of change of velocity, it is the ratio of distance to time.

Mr. Fowles runs at a steady 4.2 miles per hour. The time taken to cover 26 miles is:

speed = distance / time

time = distance / speed = 26 / 4.2 = 6.19 hour

I run at 3 miles per hour. I was given 3 mile lead, so the remaining distance is 23 miles (26 - 3). The time needed to complete the 23 miles is:

time = distance / speed = 23 / 3 = 7.67 hour

a) Let d be the distance Mr Fowles catches me. Hence:

time = (d + 3)/4.2; also time = d/3

(d + 3)/4.2 = d/3

3d + 9 = 4.2d

1.2d = 9

d = 7.5 miles

He would catch me at 10.5 (7.5 + 3) miles from the starting point.

b) Mr. fowles finishes after 6.19 hour. At that time, the distance is have covered is:

distance = 6.19 * 3 mi/hr = 18.57 mile

Distance behind = 23 mile - 18.57 = 4.43 mile

c) time longer = 7.67 hour - 6.19 hour = 1.48 hour

4 0
2 years ago
A. Ana bought a table having an area of
Anna35 [415]

Answer:

The side length of the table is x + 5

Step-by-step explanation:

To solve this, you need only take the square root of the area:

\sqrt{x^2 + 10x + 25}\\= \sqrt{(x + 5)^2}\\= x + 5

So the side length of the table is x + 5

7 0
3 years ago
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