2 years ago

What is 2x 3 -7x^{3}−7x 3

Mathematics

1 answer:

Sidana [21]2 years ago

7 0

Answer:

It is given that

4x/3−7x/3=1

Step-by-step explanation:

By further calculation

−3x/3=1

So we get

−x=1

x=−1.

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A contractor combined x tons of a gravel mixture that contained 10 percent gravel G, by weight, with y tons of a mixture that co

White raven [17]

Answer:

The value of x would be $\frac{3}{5}y$ or $\frac{3}{8}z$

Step-by-step explanation:

Given,

x tons of 10% gravel G mixture is mixed with y ton of 2% gravel G to obtain 5% gravel mixture,

Thus, gravel G in x ton + gravel in y ton = gravel G in the resultant mixture,

⇒ 0.1x + 0.02y = 0.05(x+y),

0.1x - 0.05x = 0.05y - 0.02y

0.05x = 0.03y

$\implies x = \frac{0.03}{0.05}y=\frac{3}{5}y----(1)$

Now, resultant mixture is z ton,

i.e. $z=x+y$

$\implies y = z - x$

From equation (1),

$x=\frac{3}{5}(z-x) = \frac{3}{5}z-\frac{3}{5}x$

$x+\frac{3}{5}x=\frac{3}{5}z$

$\frac{8}{5}x=\frac{3}{5}z$

$x=\frac{3}{8}z$

3 0

3 years ago

In January, Wally's Widget World had sales of $12,500 and expenses of $10,200. The profit for January was _____.

likoan [24]

Easy, $12, 500 - $10, 200 = ?

8 0

3 years ago

9/2 divided by 1/4= ? in simplest form

Allisa [31]

Answer: 18

<u>Do Keep Change Flip (KCF)</u>

Keep: 9/2

Change: ÷ into ×

Flip: 1/4 into 4/1

Your new problem should be 9/2×4/1

<u>Multiply</u>

9/2×4/1=36/2

36/2=18

Final Answer: 18

7 0

3 years ago

What is the slope of a line perpendicular to the line whose equation is 2x-y=5 ?

mariarad [96]

Answer:

-1/2

Step-by-step explanation:

the slope of the line 2x-y=5 is 2

a perpendicular line has the negative reciprocal of the slope of the other line

hopefully this helps :)

3 0

2 years ago

if a dog food costs 0.75 per pound, and dog bones cost 1.75 each, what is the cost of 2 bones and 25 pounds of dog food?

Studentka2010 [4]

Answer:

2 bones and 25 pounds of dog food would cost $22.25

Step-by-step explanation:

5 0

3 years ago