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3 years ago

Please help me answer this question?

Mathematics

1 answer:

forsale [732]3 years ago

5 0

Answer:

Yes the car was speeding

Step-by-step explanation:

s = √(30fd) where

s is the speed of the car in mph
f is the coefficient of friction for the road
d is the length in feet of the skid marks

Substitute d = 41.5 and f = 0.8 into the equation:

s = √(30 x 0.8 x 41.5)

⇒ s = √(996)

⇒ s = 31.55946768...

Therefore, for these data, the speed of the car was 31.56 mph (to the nearest hundredth)

The speed limit was 30 mph, therefore the car was speeding as 31.56 > 30

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6 0

4 years ago

A 1,300 kg car moving at 20 m/s and a 900 kg car moving at 15 m/a in precisely opposite directions crash head on. If we consider

Dmitry_Shevchenko [17]

Answer:

17.96m/s

Step-by-step explanation:

Based on law of conservation of momentum;

m1u1 +m2u2 =(m1+m2)v

v is the velocities of the car after impact

Substitute the given values

1300(20)+900(15) = (1300+900)v

26000 + 13500 = 2200v

39500 = 2200v

v = 39500/2200

v = 17.96m/s

Hence the speed of the cars after impact is 17.96m/s

5 0

3 years ago

The series 6 + 6 + 6+ 6 + 6 +

Alexandra [31]

Do you mean 6 to the 5th power. or is there another 6, if so then it would be 6 to the 6th power.

6 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP

JulijaS [17]

View the attached photo.

The quadratic function, y = x2, has an x-intercept at the origin = TRUE

The quadratic function, y = x2 + 3, has an x-intercept at the origin = FALSE

From x = -2 to x = 0, the average rate of change for both functions is positive = FALSE

When viewing a graph, you start from the left and go to right and from left to right from -2 to 0 the graph is declining.

From x = -2 to x = 0, the average rate of change for both functions is negative = TRUE

Both are declining if you read the graph from left to right.

For the quadratic function, y = x2, the coordinate (2, 3) is a solution to the equation of the function. = FALSE

y = x^2
If we insert 2 into y = x^2 we get y = 4 but our point (2,3) has y = 3

For the quadratic function, y = x2 + 3, the coordinate (2, 7) is a solution to the equation of the function. = TRUE

If we insert 2 for x, we see that y = x^2 + 3 = y = 2^2 + 3 = y = 7 and our y value in the point (2,7) is 7.

3 0

3 years ago

What is the value of 324 + 435 + 546 when written in base 7?

Arada [10]

The sum of 324, 435, and 546 is 1305. If this number were to be expressed by the base of 7, we would need to figure out what value of exponent would satisfy the requirement. This can be done by setting up an equation where 7 to the power of x must equal 1305. Using logarithms, one can solve for x and find it to be 3.6866853. Thus the sum of the aforementioned numbers, expressed in by the base of 7, is 7^3.6866853.

6 0

3 years ago