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AlekseyPX
3 years ago
5

A person leaves home at 8:00 a.m. and drives to a destination at a rate of 40 mph. The person returns at a rate of 25 mph and ar

rives at 2:30 p.m. How far was the destination?
65 miles
100 miles
130 miles
Mathematics
1 answer:
Svetlanka [38]3 years ago
8 0
100 miles... like I said before. Hope u do good on ur assignment/quiz ... :/
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The number of girls in the Middle School Cyber Club was 6 more than double the number of boys, and in total there were 48 middle
Wittaler [7]

Answer:

g = number of girls;

b= number of boys

we know that: g= 6+2b

     and that: g+b= 156 kids in total

so we may write  g+b=(6+2b)+b=6+3b

                 but g+b= 156

so 6+3b = 156 => 3b= 156-6=150 =>   b=150/3=50 => b = 50 (number of boys)

g= 6+2b= 6+2 x 50= 106 => g =106 (number of girls)  

Step-by-step explanation:

5 0
2 years ago
The mean life of a particular brand of light bulb is 1200 hours. if you know that at about 95% of this brand of bulbs will last
Snowcat [4.5K]
<span>204
   First, lookup a standard normal table and see what the z-score is for 0.025 (one half of 100% - 95%) to allow for equal sized tails. You should find that the z-score is 1.96. That means that 95% of the time, the value should be within 1.96 standard deviations of the mean. Now let's calculate the standard deviation. 800 is 800 - 1200 = -400 to the left of the mean of 1200. 1600 is 1600 - 1200 = 400 to the right of the mean of 1200. So we are an equal distance of 400 on both sides of the mean. And we know from the z-score of 1.96, that we're 1.96 standard deviations from the mean. So a little division will give us the standard deviation. Which is: 400 / 1.96 = 204.0816327
   So the standard deviation of the light bulbs is 204</span>
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3 years ago
What is the mass of 20 gallons of gasoline?
Tomtit [17]
Your answer would be 14.978
3 0
3 years ago
. If x = 7 + 4√3 then find the value of x2<br> – 1/x2
inessss [21]

Answer:

you can use mathpapa it works

Step-by-step explanation:

5 0
3 years ago
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Malik, who is 5 feet tall, stands 15 feet from a mirror. In the mirror, he can see the reflection of the top of a tree, which he
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Answer:

I don't get the question?? What is the question??

Step-by-step explanation:

4 0
2 years ago
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