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Vladimir [108]
3 years ago
12

What the vaule of x in the equation 3x-4y=65, when y =4

Mathematics
1 answer:
lana [24]3 years ago
7 0

Answer: x=27


Step-by-step explanation:

3x-4(4)=65

3x-16=65

3x=65+16

3x=81

3x/3=81/3

X=27



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Roger can run one mile in 18 minutes. jeff can run one mile in 15 minutes. if jeff gives roger a 1 minute head start, how long w
gladu [14]

Alright, lets get started.

Roger can run one mile in 18 minutes.

Jeff can run one mile in 15 minutes.

Suppose in x minutes, they both will catch up.

Roger runs in 18 minutes = 1 mile

So, Roger will run in 1 minute = \frac{1}{18} miles

So, Roger will run in x minutes = \frac{x}{18} miles

Jeff runs in 15 minues = 1 mile

So, Jeff will run in 1 minute = \frac{1}{15} mile

As Jeff gives roger a 1 minute head start, means Jeff will have x-1 minute time to run

So, Jeff will run in (x-1) minute = \frac{x-1}{15}

As both are cathing up means they both runs same distance, means

\frac{x}{18} =\frac{x-1}{15}

Cross Multiplying

15 x = 18x - 18

3 x = 18

x = 6 minutes

So for calculating distance = speed * time

Distance = \frac{1}{18} *6 = \frac{1}{3} miles

It means it will take 1/3 or 0.33 miles before jeff catches up to roger.   :   Answer

Hope it will help :)



4 0
3 years ago
1 1/4 as a whole number
monitta
Probably
Like
Or
Because
It’s
Gong
To
Be
A
Decimal 2.75
3 0
3 years ago
Why is the inequality sign reversed in the last steps of exercise 2?
Darina [25.2K]
Whenever you multiply or divide an inequality by a negative number, you must flip the inequality sign
5 0
4 years ago
-1/3=j/4-10/3 solve for j
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J = 12

Workings in the picture below :)

3 0
3 years ago
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