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devlian [24]
3 years ago
9

A jet travels 500 miles in 5 hours. What is the ratios of miles to hours?

Mathematics
1 answer:
tia_tia [17]3 years ago
3 0

Answer:

different answers in step-by-step

Step-by-step explanation:

100 mph

100mi:1hr

100mi/1hr

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The drying times for a certain type of cement are normally distributed with a standard deviation of 30 minutes. A researcher wis
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Answer:

h. 36

Step-by-step explanation:

For a 68.26% confidence, z = 1.0.

Standard deviation (s) = 30 minutes

The sample size needed to assure that the sample mean does not differ from the true mean by more than 5 minutes is given by:

5\geq z*\frac{s}{\sqrt n}\\\sqrt n\geq 1*\frac{30}{5}\\n\geq 36

The sample size needed is 36.

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Answer:

  162°

Step-by-step explanation:

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How do you simplify (d+5) +(d+5) +(d+5)?
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Answer:

Step-by-step explanation:

(d + 5) + (d + 5) + (d + 5).....combine like terms

3d + 15 <===

6 0
3 years ago
Solve the following equation for the
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Equation álgebra<br> 3x^2 = 12<br> a. +3<br> b. +2<br> C. +3.5<br> d. +1.5
Tom [10]

Answer:

x=-2,2

Step-by-step explanation:

Since this is a quadratic equation, -2 or 2 could be the possible answer

Steps

$3x^2=12$

$\mathrm{Divide\:both\:sides\:by\:}3$

$\frac{3x^2}{3}=\frac{12}{3}$

$\mathrm{Simplify}$

$x^2=4$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{4},\:x=-\sqrt{4}$

Show Steps

$\sqrt{4}=2$

Show Steps

$-\sqrt{4}=-2$

$x=2,\:x=-2$

3 0
3 years ago
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