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DaniilM [7]
3 years ago
9

Are these answers right? if not tell me what number and the explanation thank you :)

Mathematics
1 answer:
zheka24 [161]3 years ago
7 0

Answer:

theyre correct

Step-by-step explanation:

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Please explain how you get the answer to...<br> a+2a+7+4a-8
sammy [17]

Answer:

9+2a+7+4a-8

2a+16+4a-8

2a+8+4a

6a+8

Step-by-step explanation:

you can't really get an answer for this problem but you can simplify it

8 0
3 years ago
Line/ has a ___ slope
Masja [62]
A line that would appear like this ( / ) on a graph would have a positive slope because the coordinates that the line passes through are increasing from left to right.
3 0
3 years ago
Two cars start out together from the same place. they travel in opposite​ directions, with one of them traveling 5 miles per hou
Mashutka [201]
<u>Annotation</u>
General formula for distance-time-velocity relationship is as following
d = v × t
The velocity of the first car will be v₁, the time is 2 hours, the distance will be d₁.
The velocity of the second car will be v₂, the time is 2 hours, the distance will be d₂.


One of them traveling 5 miles per hour faster than the others. That means the velocity of the first car is 5 miles per hour more than the velocity of the second car.
v₁ = v₂ + 5  (first equation)

The distance of the two cars after two hours will be 262 miles apart. Because they go to opposite direction, we could write it as below.
d₁ + d₂ = 262 (second equation)

Plug the d-v-t relationship to the second equation
d₁ + d₂ = 262
v₁ × t + v₂ × t = 262
v₁ × 2 + v₂ × 2 = 262
2v₁ + 2v₂ = 262

Plug the v₁ as  (v₂+5) from the first equation
2v₁ + 2v₂ = 262
2(v₂ + 5) + 2v₂ = 262
2v₂ + 10 + 2v₂ = 262
4v₂ + 10 = 262
4v₂ = 252
v₂ = 252/4
v₂ = 63
The second car is 63 mph fast.

Find the velocity of the first car, use the first equation
v₁ = v₂ + 5
v₁ = 63 + 5
v₁ = 68
The first car is 68 mph fast.

Answer
\boxed{\boxed{ v_{1}=68mph} }
\boxed{\boxed{ v_{2}=63mph} }
7 0
3 years ago
Que números primos son mayores que -6
kumpel [21]
No sé, prueba 2,3,5,7,11,13....
Hay muchos números primos!
7 0
3 years ago
Ahmed bought a car for $5000 which is the 80% of the original price of the car. Calculate the original price of the car.
WITCHER [35]

Answer:

$6250

Step-by-step explanation:

5000 = 80%

5000/80=62.5

62.5*100=6250

8 0
3 years ago
Read 2 more answers
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