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4 years ago

State whether each statement is true or false,the sum of two positive integers is positive?

Mathematics

1 answer:

Dominik [7]4 years ago

5 0

True. if you add two positive numbers, the sum will always be positive..

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Carl can paint a room 3 hours faster than Jennifer can

Nata [24]

Jen take x hours.
Carl (x-3)hours.
Jen+carl take two hours;
This means;
In 1 hour, for they work
$\frac{1}{x} + \frac{1}{x-3}$
= $\frac{(x-3)+x}{x(x-3)}$
= $\frac{2x-3}{x(x-3)}$
Working together, they take two hours;
Take reciprocal of above equation and equate to two;
= $\frac{x(x-3)}{2x-3} =2$
$x^{2}$ -3x=4x-6
$x^{2} -7x+6=0$
$x^{2}$ -x-6x+6=0
x(x-1)-6(x-1)=0
(x-6)(x-1)=0
Take the bracket x-6=0 so that Carl works positive hours
x-6=0
x=6

8 0

3 years ago

Questions in photo pls help me its due tomorrow.

Paraphin [41]

When u simplify it will be x=3

6 0

3 years ago

Slope = 4, point (3,-2) is on the line

Leni [432]

Answer:

y = 4x + b

Step-by-step explanation:

We know that (3, -2) is on this line. So 3 = m(-2)+b.

This leaves us with two variables the slope (m) and the y intercept (b).

But wait a minute, the slope is given to us since it says slope = 4.

Our equation is now, 3 = 4(-2)+b

3 = -8 + b

b = 11.

Our final equation is now y = 4x + b.

(y,x) is a point on this line.

Hope this helped!

JoeLouis2

8 0

3 years ago

What is 20/25 as a percent

Serggg [28]

Answer:

80%

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Plz answer b I don't get it

rewona [7]

What is the question??

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3 years ago