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Natali5045456 [20]

3 years ago

13

The train travels 580 miles in 4 hours. The train travels at a constant rate. At this rate, how many hours will it take the trai

n to travel 725 miles? It takes the train type your answer... hours to travel 725 miles.

1 answer:

Mandarinka [93]3 years ago

8 0

We set up the equation 580/4 = 725/x. Since we know these are proportional, we can cross-multiply and solve to get x = 5.

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Consider a population consisting of the number of teachers per college at small 2-year colleges. Suppose that the number of teac

agasfer [191]

Answer:

a) $\frac{8}{9}$ =0.89

b) 0.8413

Step-by-step explanation:

we know that

$P(║ x -\mu║ \leq k\sigma) \geq 1 -\frac{1}{k^2}$

$so, \mu = 150, \sigma = 20$

$k = \frac{210 - 150}{20} =\frac{150 - 90}{20} = 3$

$P(║ x -150 ║ \leq 3\times 20) \geq 1 -\frac{1}{3^2} = \frac{8}{9}$

x - N(150, 20^2)

$P(X \leq 170) = 0.8413447$

check

$P norm = \frac{170 - 150}{20}= 0.8413447$

8 0

3 years ago

Need help with both questions please

Inessa [10]

9)To find the LCD you need to find a number that all of the denominator numbers can divide into, for this problem it would be 12. 12/6+12/4+12/3=1
2+3+4=1
9=1
No solution
10) In order to solve this problem you need to cross multiply
2(3x+5)=7(10
6x+10=70
6x=60
x=10
Have a great day!:)

5 0

3 years ago

I’m not sure what the answer can I get some help

Ronch [10]

Answer:

B.) $9.25p + 8.9t\leq 100$

Step-by-step explanation:

8 0

3 years ago

Find the perimeter of this triangle.<br> 10 cm<br> 17 cm<br> 8 cm<br> 21 cm<br> P = [ ?] cm

8_murik_8 [283]

Answer:

perimeter=21+17+10

=48cm

6 0

3 years ago

Bruh can someone answer this I’ll give brainliest

3241004551 [841]

It’s a ! you add both of the numbers to get your missing perimeter.
I’m very sorry if it’s wrong but this is what I believe! stay safe

4 0

3 years ago