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sineoko [7]
3 years ago
15

In 3 hours , a car travels 120 miles. What’s is the speed of the car?

Mathematics
2 answers:
atroni [7]3 years ago
7 0
40 because you would divide the miles by hours to find the rate of change. 

120/3= 40
dalvyx [7]3 years ago
6 0
The car is traveling 40 miles per hour. This is because we need to find the unit rate of 120miles in 3 hours. You would just divide 120 by 3 to find it.
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Solve the system of equations algebraically.
andrew11 [14]

Answer: d. (17, 20)

Step-by-step explanation:

We have the following system of equations:

x-3y=8 (1)

5x-4y=5 (2)

Isolating x from (1):

x=\frac{8+3y}{4} (3)

Substituting (3) in (2):

5(\frac{8+3y}{4})-4y=5 (4)

Isolating y:

\frac{40}{4}+\frac{15 y}{4}-4y=5 (5)

10-5=4y-\frac{15 y}{4} (6)

y=20 (7)

Substituting (7) in (1):

x-3(20)=8 (8)

Isolating x:

x=17 (9)

Hence, the correct option is d. (17, 20)

8 0
3 years ago
What’s the domain and range
Softa [21]

Answer:

domain is x range is y

Step-by-step explanation:

4 0
3 years ago
Solve the Quadratics:
klasskru [66]

Answer:

Step-by-step explanation:

1 ) k²-8k = 0

k(k-8)=0

k = 0 or k=8

2) a²+5a=0

a(a+5) = 0

a=0 or a  = - 5

3 ) 6n²+5n-25=0

delta = b²-4ac      b =5 and a = 6   and   c= - 25

delta = 5²-4(6)(-25) = 625 = 25²

n 1 = (-5+25)/12 = 20/12 = 5/3

n 2 = (-5-25)/12 = -  30/12  = -5/2

same method for 4) and 5)

6 0
3 years ago
mrs.jones is thinking of a number thst when rounded to nearest hundred is 400 what is the number explain
kherson [118]
The number could be several different ones. Are you sure that's exactly what the problem says? If not, I'm going to ask you write the entire problem. If not, then whoever made it did not give enough information for there to be an absolute answer. I'm sorry I couldn't help you, but I really hope I can with more information.
6 0
3 years ago
Hello"! Need Help!
stealth61 [152]
<h3>⚠ANSWER⚠</h3>

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4 0
2 years ago
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