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3 years ago

If you help I will give you brainliest

Mathematics

1 answer:

hammer [34]3 years ago

8 0

9514 1404 393

Answer:

5 miles

Step-by-step explanation:

Time/speed/distance problems can be worked a number of ways. Here, we want to know the distance walked. We know the total time and the total distance and the two different speeds. So, we can use a variable to represent the value we want to know: w = distance walked (in miles).

The total time is 9:00 -6:50 = 2:10 = 2 1/6 hours = 13/6 hours.

The total time is the sum of times for the two parts of the trip: walking and riding.

walking time = walking distance/walking speed

= w/3

riding time = riding distance/riding speed

= (20-w)/30

The total time is that given above:

w/3 +(20-w)/30 = 13/6

10w +(20 -w) = 65 . . . . . . . . multiply by 30

9w = 45 . . . . . . . . . . . . subtract 20, collect terms

w = 5 . . . . . . . . . . . divide by 9

The girl walked 5 miles.

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In 2000, 49 %49% of the residents in a large city regularly used newspapers for getting news and this has decreased at an avera

kogti [31]

Answer:

P(x) = -1.1x +49

Step-by-step explanation:

You are given the percentage in 2000 (for x=0) as 49, and told that its rate of change is -1.1 percent per year. So, with a slope of -1.1 and an intercept of 49, the slope-intercept form of the linear equation becomes ...

P(x) = -1.1x +49

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7 0

3 years ago

2. Jamie is the starting pitcher for his baseball team. The coach recorded the number of pitches he threw in one game. Each pitc

Likurg_2 [28]

90, because 60% of 90 is 54

3 0

3 years ago

A pile of sand has a weight of 90kg.

ankoles [38]

Answer:

9Kg, 18Kg and 63 Kg

Step-by-step explanation:

Sum the parts of the ratio, 1 + 2 + 7 = 10 parts

Divide the weight of sand by 10 to find the value of one part of the ratio

90 Kg ÷ 10 = 9 Kg ← value of 1 part of the ratio, thus

2 parts = 2 × 9 Kg = 18 Kg

7 parts = 7 × 9 Kg = 63 Kg

Thus the weights of each bag are 9 Kg, 18 Kg and 63 Kg

3 0

2 years ago

Stephon has a square brick patio. He wants to reduce the width by 4 feet and increase the length by 4 feet.

alekssr [168]

Answer: The expressions for the length and width of the new patio are

$\ell=x+4,~~w=x-4.$

And the area of the new patio is 384 sq. feet.

Step-by-step explanation: Given that Stephen has a square brick patio. He wants to reduce the width by 4 feet and increase the length by 4 feet.

The length of one side of the square patio is represented by x.

We are to write the expressions for the length and width of the new patio and then to find the area of the new patio if the original patio measures 20 feet by 20 feet.

Since Stephen wants to reduce width of the patio by 4 feet, so the width of the new patio will be

$w=(x-4)~\textup{feet}.$

The length of the patio is increased by 4 feet, so the length of the new patio will be

$\ell=(x+4)~\textup{feet}.$

Now, if the original patio measures 20 feet by 20 feet, then we must have

$w=x-4=20-4=16~\textup{feet}$

and

$\ell=x+4=20+4=24~\textup{feet}.$

Therefore, the area of the new patio is given by

$A_n=\ell \times w=24\times16=384~\textup{sq. feet}.$

Thus, the expressions for the length and width of the new patio are

$\ell=x+4,~~w=x-4.$

And the area of the new patio is 384 sq. feet.

4 0

3 years ago

A wheelchair ramp is in the shape of a triangular prism. it has a base area of 37.4 square yards and a height of 5 yards. find t

mina [271]

It's not the volume of the ramp, it's the angle.

anyways here's how to use trig to find the answer:

Tan <A= opposite/ adjacent
Tan <A= 5.0/ 37.4

<A= tan-1 (5.0/ 37.4)

<A= 7.61 degrees.

7 0

3 years ago