All categories

3 years ago

Subtract. 7 1/5 − (−3/5)

Mathematics

2 answers:

mojhsa [17]3 years ago

5 0

This would just be 7 1/5 + 3/5 since the negative sign gets distributed and makes (-3/5) into a positive number.

From there you have basic math and you get 7 4/5.

Dennis_Churaev [7]3 years ago

3 0

7 1/5 - (-3/5) = 7 4/5

Hope this helps you

-AaronWiseIsBae

You might be interested in

The math department sold pie slices to buy new math books. Two pies were contributed by members of the department. Each pie was

kenny6666 [7]

The answer is 8, just divide 6 by 48. Hope it helped.

8 0

2 years ago

Read 2 more answers

Which line has a slope of 1, and which has a slope of 2?

aleksley [76]

Answer:

Line "L" has the slope of 1 and line "K" has the slope of 2.

In order to graph a line with the slope of $\frac{1}{3}$ think of the numerator as the "rise" (how much you move up/down on the y-intercept) and the denominator as the "run" (how much you move to the side on the x-intercept)

Step-by-step explanation:

A slope of "1" is simply $\frac{1}{1}$ so you rise up one and move to the right once. This clearly demonstrated on line "L".

A slope of "2" is $\frac{2}{1}$ so you rise up two and move to the right once, as is demonstrated on line "K".

For the 2nd question, line "A" will have a slope of $\frac{1}{3}$ therefore it will move up once and then to the side three times. It will look like the image attached to this answer.

I hope this helped! Feel free to ask questions if needed!

6 0

2 years ago

Hhhhhhhhhhhhhhhhhhhhhheeeeeeeeelp

Aleks04 [339]

Divide $-11 \frac{1}{5}$ by 5. Or multiply it by 1/5.

You get - 56/25 or $-2 \frac{6}{25}$ pounds per month.

5 0

3 years ago

A ball is thrown downward from a cliff. Its position at time t seconds is given by the formula s(t) = 16t2 + 32t, where s is in

Rom4ik [11]

Answer:

It takes 2.8 seconds for the ball to fall 215 ft.

Step-by-step explanation:

We are given a position function s(t) where s stands for the number of feet the ball has fallen, so we have to replace s with the given value of 215 ft and solve for the time t.

Setting up the equation.

The motion equation is given by

$s(t) =16t^2+32t$

We can replace there s = 215 ft to get

$215=16t^2+32t$

Solving for the time t.

From the previous equation we can move all terms in one side to get

$16t^2+32t-215=0$

At this point we can solve for t using quadratic formula.

$t = \cfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

where a, b and c are the coefficients of the quadratic equation

$at^2+bt+c=0$

So we get

$a=16\\b=32\\c=-215$

Replacing on the quadratic formula we get

$t = \cfrac{-32\pm \sqrt{32^2-4(16)(-215)}}{2(16)}$

Using a calculator we get

$t=-4.8 , t = 2.8$

Physically speaking the only result that makes sense is to move forward in time that give us t = 2.8 seconds.

We can conclude that it takes 2.8 seconds for the ball to fall 215 ft.

3 0

3 years ago

What is the ratio of the volume of Cylinder A to the volume of Cylinder B?

erastovalidia [21]

Answer:

The ratio of volume of Cylinder A to the volume of Cylinder B is 18:25.

Step-by-step explanation:

Dimension of cylinder A,

Radius is 3 units and height is 4 units.

Dimension of cylinder B,

Radius is 5 units and height is 2 units.

The volume of a cylinder is given by :

$V=\pi r^2 h$

For cylinder A to B,

$\dfrac{V_A}{V_B}=(\dfrac{r_A}{r_B})^2\times \dfrac{h_A}{h_B}\\\\\dfrac{V_A}{V_B}=(\dfrac{3}{5})^2\times \dfrac{4}{2}\\\\\dfrac{V_A}{V_B}= \dfrac{18}{25}$

So, the ratio of volume of Cylinder A to the volume of Cylinder B is 18:25.

3 0

2 years ago