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2 years ago

Answer this plz cdfdsfgdgshsh

Mathematics

1 answer:

creativ13 [48]2 years ago

7 0

Answer:

C the tree grew 6 inches in 2 months

I hope this helps and have a delightful day

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A cargo grain leaves Chicago at noon travelling west at 120 km/h. At 2 pm, a passenger train leaves Chicago travelling east at 3

AfilCa [17]

Answer:

a) The trains will be 1520 km apart at 2:40 pm for the cargo train and at 4:40 pm for the passenger train.

b) At that time the cargo train has traveled 560.04 km and the passenger train has traveled 960.12 km.

Step-by-step explanation:

a) First, we need to find the distance traveled by the cargo train in the two hours before the passenger train leaves Chicago:

$x_{1} = v_{1}t_{1} = 120 km/h*2h = 240 km$

Now, we can find the time when the trains will be 1520 km apart:

$1520 km = (x_{1} + 240 km) + x_{2}$

Where 1 is for the cargo train and 2 is for the passenger train.

$1520 km = (v_{1}*t_{1} + 240 km) + v_{2}t_{2}$

Since we need to calculate the time when the trains are 1520 km apart, t₁ = t₂, so:

$1520 km = (v_{1}*t + 240 km) + v_{2}t$

$t = \frac{1520 km - 240 km}{120 km/h + 360 km/h} = 2.667h$

For the cargo train, it will be 1520 km apart from the passenger train at:

$t_{1} = 12 pm + 2 h + 40 min = 2:40 pm$

And for a passenger train, it will be 1520 km apart from the cargo train at:

$t_{2} = 2 pm + 2 h + 40 min = 4:40 pm$

Hence, the trains will be 1520 km apart at 2:40 pm for the cargo train and at 4:40 pm for the passenger train.

b) The distance traveled by both trains is given by:

$x_{1} = v_{1}*t + 240 km = 120 km/h*2.667 h + 240 km = 560.04 km$

$x_{2} = v_{2}*t = 360 km/h*2.667 h = 960.12 km$

Therefore, at that time the cargo train has traveled 560.04 km and the passenger train has traveled 960.12 km.

I hope it helps you!

5 0

2 years ago

Simplify 8(xy + 8) + 1.

kobusy [5.1K]

Look at the picture.

I hope this helps!

5 0

2 years ago

Read 2 more answers

The data given for a football kicked from the field follows a quadratic model, h(x) = - 3x2 + 18x + 7. Where h(t) is the height

OLga [1]

Answer:

C) 34

Step-by-step explanation:

use -b/2a to find the x value of the vertex (3)

then plug 3 into equation

- 3(3)² + 18(3) + 7

the answer is 34

4 0

2 years ago

Complete the ratio<br> 4 : ? = 1 : 6

jolli1 [7]

I think the answer is 4:24

7 0

3 years ago

Read 2 more answers

A production process produces 2% defective parts. a sample of 5 parts from the production is selected. what is the probability t

Lana71 [14]

Answer:

Probability of a sample that contains exactly two defective parts is .0037 or .37%

Step-by-step explanation:

As we know if P is the probability of achieving k results in n trials then probability formula is P = $\binom{n}{k}p^{K}q^{n-k}$

In this formula n = number of trials

k = number of success

(n-k) = number of failures

p = probability of success in one trial

q = (1-p) = probability of failure in one trial

In this sum n = 5

k = 2

number failures (n-k) = (5-2) = 3

p = 2% which can be written as .02

q = 98% Which can be written as .98

Now putting these values in the formula

P = $\binom{5}{2}(.02)^{2}(.98)^{5-2}$

P = $\binom{5}{2}(.02)^{2}(.98)^{3}$

$\binom{5}{2}= 5!/3!2!$

= 5×4×3×2×1/3×2×1×2×1

= 5×2 =10

P = 10×(.02)²×(.98)³

= .0037 or .37%

4 0

3 years ago

Read 2 more answers