All categories

3 years ago

Which of the following equations has a solution that is negative?

Mathematics

1 answer:

drek231 [11]3 years ago

3 0

Answer:

b. – 0.4(x + 1.6) = 1.6

Step-by-step explanation:

You might be interested in

What is the value of x? HELP

algol13

Answer;

50 :) Because 105 minus 55 is 50 hope this helped you out :))

4 0

4 years ago

Diabetes is a disease that affects millions of Americans. In fact, about 25,585,000 U.S. adults had diabetes in 2010. At that ti

denis-greek [22]

Answer:

8.28%

Step-by-step explanation:

According to the U.S. Census Bureau, the legal official department in charge of the National Census every ten years, the population of the U.S.A in 2010 was 308,745,538 inhabitants.

If about 25,585,000 had diabetes, then cross multiplying

308,745,538-------100%

25,585,000---------x%

and

$\frac{308,745,538}{25,585,000}=\frac{100}{x}$

and so, about

$x=\frac{25,585,000*100}{308,745,538}=8.28 \%$

Americans had diabetes in 2010.

7 0

4 years ago

Pipe A can fill a tank in 5 hours. Pipe B can fill it in 2 hours less time than it takes pipe C, a draining pipe, to empty the t

sukhopar [10]

Answer: Time taken by pipe C to empty the tank = 5 hours.

Step-by-step explanation:

Pipe A can fill a tank in 5 hours.

Let time taken by Pipe C = x ( hours)

Time taken by Pipe B = x-2 ( hours)

Now, with all 3 pipes open, it takes 3 hours to fill the tank, it can be represented as

$\dfrac15+\dfrac1{x-2}-\dfrac1x=\dfrac 13\\\\\Rightarrow\ \dfrac{x-(x-2)}{x(x-2)}=\dfrac13-\dfrac15\\\\\Rightarrow\ \dfrac{x-x+2}{x^2-2x}=\dfrac{5-3}{15}\\\\\Rightarrow \dfrac{2}{x^2-2x}=\dfrac2{15}\\\\\Rightarrow\ x^2-2x=15\\\\\Rightarrow\ x^2-2x-15=0\\\\\Rightarrrow\ x^2-5x+3x-15=0\\\\\Rightarrow\ x(x-5)+3(x-5)=0\\\\\Rightarrow\ (x-5)(x+3)=0\\\\\Rightarrow\ x=5, -3$

Time cannot be negative,

So, x=5

Thus, Time taken by pipe C to empty the tank = 5 hours.

8 0

3 years ago

What is the answer to: x+1>-5(7-2x)

blondinia [14]

Simplified answer: x<4

5 0

4 years ago

Question 10: please help asap !!!!

enyata [817]

Answer:

-x^2-2xy-3x

Step-by-step explanation:

7 0

2 years ago