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WARRIOR [948]
2 years ago
5

18. If 5x (14-x) = 0, then what does x equal?

Mathematics
1 answer:
Tomtit [17]2 years ago
5 0

Answer:

(D) 14

Step-by-step explanation:

5x (14-x) = 0

5(14)*(14-14)=0

70*0=0

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Carla is 5 years old and Jim is 13 years younger than Peter. One year ago Peter's age was twice the sum of Carla and Jim's age.
kari74 [83]
Carla = 5 years old
Jim = 2 years old
Peter = 15 years old
(Peter was 14 years old one year ago)
5+2=7
7x2=14 (14 is the age from one year ago meaning 15 is the current age)
15-2=13
4 0
3 years ago
Reagan and Nathan are 40 miles apart on a bike trail when they start pedaling toward each other on their b bicycles. Reagan ride
irinina [24]

Answer:

They meet in 2.22 hours.

Step-by-step explanation:

We can find the time at which Reagan and Nathan meet by equaling the time as follows:

v_{R} = \frac{x_{R}}{t}  

x_{R} = v_{R}t    (1)      

v_{N} = \frac{x_{N}}{t}  

x_{N} = v_{N}t   (2)

Where R is for Reagan and N for Nathan.

Knowing that:

x_{R} + x_{N} = 40 mi

By adding equations (1) and (2) we have:

x_{R} + x_{N} = v_{R}t + v_{N}t

t = \frac{x_{R} + x_{N}}{|v_{R}| + |v_{N}|} = \frac{40 mi}{8 mi/h + 10 mi/h} = 2.22 h

Therefore, they meet in 2.22 hours.        

I hope it helps you!                                                                                                                                                                                                 

4 0
2 years ago
Read 2 more answers
Use the functions a(x) = 3x + 10 and b(x) = 2x − 8 to complete the function operations listed below.
Gnoma [55]
For part A, you simply add the two functions a(x) and b(x). The resulting function is then (a+b)(x) = 5x +2.

For part B, you multiply the functions a(x) and b(x). Using the FOIL method, we obtain, 6x^2 -24x + 20x - 80. Simplifying, we get, (a*b)(x) =  6x^2 -4x - 80.

For part C, you replace x in the function a(x) with the expression from b(x). This results to: a[b(x)] = 3(2x - 8) +10. Simplifying, a[b(x)] = 6x - 14.
7 0
3 years ago
A potential employer offers to pay you a starting salary of $55,000 a year, and guarantees a
balandron [24]

Answer:270,000

Step-by-step explanation:

i think

6 0
3 years ago
I really do need help solving this equation
strojnjashka [21]

Answer:

D

Step-by-step explanation:

3/5 = 0.6

75% = .75

0.8, 0.75, 0.6, 0.56

8 0
3 years ago
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