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4 years ago

What is 15 + 9 = ?(5 + 3)

Mathematics

1 answer:

faltersainse [42]4 years ago

4 0

3 because 5 times 3 it’s 15 and 3 times 3 is nine

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12. Linda walks through a road. If her walking speed increases from 1 m/s to 1.5 m/s, she will complete the walk 200 s earlier.

Katen [24]

Answer:

600 meters

Step-by-step explanation:

Case 1 : Speed of 1 m/s

d = v * t
d = 1 * t
d = t [Equation 1]

Case 2 : Speed of 1.5 m/s

d = v * t
d = 1.5 * (t - 200)
d = 1.5t - 300 [Equation 2]

As distance in both cases is the same, equate the values of d from both equations.

t = 1.5t - 300
0.5t = 300
t = 300 * 2
t = 600 s

Now, put the value of t in Equation 1 to find d.

d = 600 meters

7 0

2 years ago

Sharon started driving on the highway in the morning. The equation m=60h represents the number of miles, m, that Sharon has driv

Katen [24]

Answer: car 1, and car 4

Step-by-step explanation: if you look at the graphs you would have to look at where 1 hour would hit 60. If it’s past 60, the car is moving faster than sharon. Hope this helps!

3 0

3 years ago

Solve the system by substitution x=y 6x-3y=30

Tasya [4]

Answer: (x, y) = (10, 10)

Since x = y, replacing y with x in 6x - 3y = 30 we have 6x - 3x = 3x = 30, so x = 30/3 = 10. Then y = x = 10, so the solution is (10, 10).

i hope this helps! :D

8 0

3 years ago

HELP PLEASE!! The cost of calling Raymond's friend in Singapore is $3.00 plus $0.40 per minute. The cost as a function of time i

german

The equation would be y= .40x + 3 , The slope would be 2/5 and the y intercept would be 3 , the cost of a 20 minute call would be 11 dollars

7 0

3 years ago

A company gives each worker a cash bonus every Friday, randomly giving a worker an amount with these probabilities: $10 - 0.75,

Shkiper50 [21]

The worker's expected weekly bonus is $30.0

<h3>How to determine the worker's expected weekly bonus?</h3>

The amounts and the probabilities are given as:

x $10 $50

P(x) 0.75 0.25

The worker's expected weekly bonus is calculated as:

$E(x) = \sum x * P(x)$

So, we have:

E(x) = $10 * 0.75 + $50 * 0.25

Evaluate the product

E(x) = $17.5 + $12.5

Evaluate the sum

E(x) = $30.0

Hence, the worker's expected weekly bonus is $30.0