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3 years ago

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4. Find the unit rate for 306 miles in 10 hours. (1 point)

1 answer:

viva [34]3 years ago

8 0

<span>4. Unit rate implies how much in one hour. If 306 miles is in 10 hours, in one hour, it will be just one-tenth of 306 miles. So divide 306 by 10. To divide by 10, just place a point before one digit from the right. So the answer will be 30.6 milers/hour. 5. Unit rate here implies how much in one month. If 33.6 gallons is in 6 months, in one month, it will be just one-sixth of 33.6 gallons. So divide 33.6 by 6. The answer will be 5.6 gallons/month.</span>

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25 students in a class took an algebra test 20 students passed the test what percent passed help

marysya [2.9K]

Answer:

80% of the students passed the algebra test

Step-by-step explanation:

So for this question, they want to know the percentage of the people that passed.

20 out of 25 students passed, we could find the percentage using two ways:

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1. We can use proportions to figure out the percentage (This can only work if the numbers are factorable by 100 such as 10, 25, 50...)

25 × 4 would equal 100. You must multiply the same number to the top as well.

So 20 × 4 = 80

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2. We can divide the two numbers

20 ÷ 25 = 0.8

When changed into a percentage, 0.8 would be 80%

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Have a good day :)

4 0

3 years ago

12) As of August, 2011, Russia has had 21 rocket launch failures out of 743 total launches. To the nearest whole number, how man

bogdanovich [222]

Answer:

23

Step-by-step explanation:

It is given that, in Russia there are 21 rocket launch failures out of 743 total launches. We need to find no of failures for the next 800 launches.

21 rocket = 743 launches

1 launch = $\dfrac{21}{743}\ \text{failures}$

For 800 launches,

$=\dfrac{21}{743}\ \text{failures}\times 800\\\\=22.611\ \text{failures}$

or

= 23 failures

So, there are 23 failures in next 800 launches.

5 0

3 years ago

Does 9, 12, 15 belong to a right traingle?

Leokris [45]

Is there a picture? or something

7 0

3 years ago

FACTOR....<br>x^2 + 10× - 2400 = 0

Vikki [24]

Answer:

x= -5 + 5 $\sqrt{97}$ , x= -5 - 5 $\sqrt{97}$

Step-by-step explanation:

Since this quadratic is set to zero, we can use the quadratic formula to solve this.

x^2 + 10x - 2400 = 0

Quadractic formula = x= -b +- $\sqrt{b^2 - 4ac}$ /2a

For this equation:

a= 1, b=10, c=-2400

Plug these numbers into the equation and solve.

x= -10 +- $\sqrt{10^2 - 4(1)(-2400}$ )/2(1)

x= -10 +- $\sqrt{100 + 9,600}$ /2

x= -10 +- $\sqrt{9,700}$ /2

x= -10 +- $\sqrt{2^2 * 5^2 * 97}$ /2

x= -10 +- 5 * 2 $\sqrt{97}$ /2

x= -10 +- 10 $\sqrt{97}$ / 2

Divide by 2.

x= -5 +- 5 $\sqrt{97}$

Answer:

x= -5 + 5 $\sqrt{97}$ or x= -5 - 5 $\sqrt{97}$

5 0

3 years ago

If the sin 30=1/2 the cos 60=

PSYCHO15rus [73]

Cos(60) = cos(90 - 30) = sin(30) = 1/2

This should be what you want.

8 0

4 years ago