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natka813 [3]
3 years ago
8

PLEASE HELP!!!!!!!! WILL MARK BRAINLIEST!!!! aLSO 99 POINTS!!!!!!!! If a train is scheduled to go 87 and 1 half miles in 2 and 1

half hours, what average speed must it travel? Answer Options with 5 options A. 37 and 1 fourth miles per hour B. 43 and 3 fourths miles per hour C. 35 miles per hour D. 25 miles per hour E. 2.5 miles per hour
Mathematics
2 answers:
stepladder [879]3 years ago
8 0
I think 35 sorry if im wrong good luck!!!!!
Roman55 [17]3 years ago
3 0
The answer is C. 35 mph

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Jamie and Stella are saving money to sign up for a school trip to Washington, D.C. In order to sign up for the trip, they must p
DanielleElmas [232]

Answer:

1. Let, Jamie needs "$ g" for the  trip. Then, according to the question,

g = 600 -------------------(1)

2. Let, Stella needs "$ m" for the trip. Then, according to the question,

m = 600 -------------(2)

3. If Jamie washes x no. of cars and Stella makes y no. of pies, then,

25x ≥ 600 ≥ 15y -------------(3)

4. Yes, Stella can afford to sign up for the trip with the money she earns.

Step-by-step explanation:

Let, Jamie needs "$ g" for the  trip. Then, according to the question,

g = 600 -------------------(1)

Let, Stella needs "$ m" for the trip. Then, according to the question,

m = 600 -------------(2)

if Jamie washes x no. of cars for $25 each and Stella makes y no. of pies

for $ 15 each, then, according to the question,

25x ≥ 600 ≥ 15y -------------(3)

Yes,  Stella can afford to sign up for the trip with the money she earns. Because, she can make at most 40 pies for $15 each and

$ 40 \times 15 = $ 600 = The amount of money Stella needs for the trip.

7 0
3 years ago
Solve the following equation for 0°≤x≤360° : 2 cot 2x + 3 = 0
evablogger [386]

Answer:

π

2

,

3

⋅

π

2

,

3

⋅

π

4

,

7

⋅

π

4

Explanation:

Factorizing your equation we get

cot

(

x

)

=

0

so

cos

(

x

)

=

0

we get the following Solutions in the given interval

x

=

π

72

or

x

=

3

π

2

for the second case we get

cot

(

x

)

=

−

1

so

cos

(

x

)

=

−

sin

(

x

)

and we get

x

=

3

π

4

or

x

=

7

π

4

Hint:

To get the Solutions of the last equation you can use

√

sin

(

x

+

π

4

)

=

0

Step-by-step explanation:

3 0
3 years ago
A rectangle and a square have the same area. The length of the rectangle is seventy feet more than two times its width. The leng
Zanzabum

Using the side of the square find the area:

Area = 30^2 = 900 square feet.

The rectangles area is the same, 900 square feet.

Let the width = X

The length would be 2X + 70

Area = length x width

X * 2x+ 70 = 900

This expands to 2x^2 * 70x = 900

Use the quadratic formula to solve for x:

-70 +/- sqrt(70^2-4*2(-900))/2*2

X = 10

Width = x = 10 feet

Length = 2x + 70 = 90 feet

8 0
2 years ago
The table below shows all of the possible outcomes for rolling two six-sided number cubes. A table with 36 possible outcomes. Th
barxatty [35]

The image is missing, we have attached the image.

Answer:

The of getting an even number in first and an odd number second is \frac{1}{4}\ or\ 0.25.

Step-by-step explanation:

Given,

Total number of outcomes = 36

We have to find the probability of rolling an even number first and an odd number second.

Solution,

Firstly we will find out the possible outcomes;

(2,1),\ (2,3),\ (2,5),\  (4,1),\ (4,3),\ (4,5),\ (6,1),\ (6,3),\ (6,5),

So the total number of outcomes = 9

Now according to the formula of probability, which is;

P(E)=\frac{\textrm{total number of possible outcomes}}{\textrm{total number of  outcomes}}

Now on putting the values, we get;

P(of getting an even number in first and an odd number second)=\frac{9}{36}=\frac{1}{4}=0.25

Hence The of getting an even number in first and an odd number second is \frac{1}{4}\ or\ 0.25.

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3 years ago
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Use a calculator it’s easier and will give u an instant answer
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