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Lunna [17]
3 years ago
10

A boy walked for 4 hours and cycled for 3 hours covering a distance of 87.6km . Later she walked for 2 hours and cycled for 4 ho

urs covering a distance of 101.8km. What was her average speed for walking and her average speed of cycling if these did not change in the two instances? ​
Mathematics
1 answer:
insens350 [35]3 years ago
5 0

Answer:

average speed for walking = 4.5 km/h

average speed for cycling = 23.2 km/h

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1 doller bill and a 10 doller bill and for quarters makes what?
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12 dollars.

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2 years ago
The image of a parabolic lens is traced onto a graph. The function f(x) = (x + 8)(x – 4) represents the image. At which points d
alexandr402 [8]

Answer:

x = -8 and x = 4

Step-by-step explanation:

given

f(x) = (x+8) (x - 4)

recall that at any point on the x-axis, y = 0 [i.e f(x) = 0]

hence to find where the graph crosses the x-axis, we simply substitue f(x) = 0 into the equation and solve for x

f(x) = (x+8) (x - 4)

0 = (x+8) (x - 4)

Hence

either,

(x+8) = 0 ----> x = -8  (first crossing point)

or

(x-4) = 0 ------> x = 4 (second crossing point)

Hence the graph crosses the x-axis at x = -8 and x = 4

7 0
3 years ago
How do you find the range of a function?
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<span>For more difficult cases, it may be easier to draw the graph first using the domain if possible and then determine the range graphically.See if you can find the inverse function. The domain of a function's inverse function is equal to that function's range.<span>Check to see if the function repeats.</span></span>
8 0
3 years ago
If f (x) = 4x - 11 , What is the value of f(5)<br> a. 20x - 55<br> b. 34<br> c. 9<br> d. 4
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Step-by-step explanation:

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5 0
3 years ago
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The correct option will be :   14 years

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So, the amount of interest earned = 1336.60-820= 516.60 dollar

Formula for Simple Interest is: I= P*r*t, where I is the amount of interest, P is the initial amount, r is the rate of interest in decimal and t is the time duration in years.

Here, I= 516.60, P= 820, r=4.5% = 0.045

Now according to the above formula, we will get...

I= P*r*t\\\\ 516.60=820*0.045*t\\\\ 516.60=36.90*t\\\\ t=\frac{516.60}{36.90}= 14

So, Susan has held the account for 14 years.

3 0
3 years ago
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