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4 years ago

Need help on #15 don't want to fail

Mathematics

1 answer:

11111nata11111 [884]4 years ago

4 0

That one is super easy i believe you can get that !!

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What is the square root of 72/25x4

Afina-wow [57]

Answer:

1.35764501988

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Mary runs 4 laps in 8 mins. Nicole runs 12 laps in 18 mins. Who runs faster

Georgia [21]

Find to LCM of 8 and 18 to compare times

Mary: 4*9laps/8*9min
36 laps/ 72 mins
Nicole: 12*4laps/18*4 mins
48 laps/ 72 mins

Nicole runs more laps in the same amount of time as Mary

Therefore, Nicole runs faster

6 0

3 years ago

Aiden is replacing the tile in a rectangular kitchen. The length of the kitchen is nine feet shorter than three times its width,

julia-pushkina [17]

Answer:

Total Cost of tile = $273.28

Step-by-step explanation:

From the given information:

Let the width be = x

Then, the length of the rectangular kitchen is L = 3x - 9

The perimeter is = 6x

Suppose the cost of the tile = $1.69 a square foot.

Then the total costs to tile the kitchen is calculated as follows:

The Perimeter of the rectangle = 2(L + b)

The Perimeter of the rectangle = 2(3x - 9 + x)

The Perimeter of the rectangle = 2(4x-9)

6x = 8x - 18

- 2x = - 18

x = 18/2

x = 9

Thus, the width = x = 9 ft

the length = 3x - 9 = 3(9) - 9

the length = 27 - 9

the length = 18 ft

Area = L × W

Area = (18 × 9)ft

Area = 162 sq. ft.

Cost of a Tile = $1.69 per sq. ft.

Thus;

Total Cost of tile = $1.69 × 162

Total Cost of tile = $273.28

7 0

3 years ago

Read 2 more answers

Car A began a journey from a point at 9 am, traveling at 30 mph. At 10 am car B started traveling from the same point at 40 mph

Natasha2012 [34]

Let after t hours the distances D1 traveled by car A

=> D1 = 30 t

Car B starts at 10 am and will, therefore, have spent one hour less than car A when it passes it.

After (t - 1) hours, distance D2 traveled by car B 

=> D2 = 40 (t - 1)

When car B passes car A, they are at the same distance from the starting point and therefore D1 = D2 

=> 30 t = 40 (t - 1)

Solve the equation for t,

=> 30 t = 40t - 40

=> 10 t = 40

=> t = 4

=> Car B passes car A at = 9 + 4 = 13 pm.

7 0

3 years ago

What is the y-intercept of a line that passes through the points (5, -6.5) and (-12, 2)?

n200080 [17]

Answer:

y-intercept = -4

Step-by-step explanation:

equation of a line: y=mx+b

two points given are (5, -6.5) and (-12, 2)

first we can easily find value of m or the slope, by using the slope formula. the value of m=-0.5.

formua to find m: $\frac{2-(-6.5)}{-12-5}$ = -0.5

to find the value of b (the y-intercept), we need to plug in a y and x value, we are given 2 ordered pairs, you can use either one and plug x-value in for x and the y-value in for y.

if i plug in (5, -6.5), my equation looks like this: -6.5=5(-0.5)+b

then you just solve for b and it turns out to be -4.

4 0

3 years ago