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2 years ago

Find the percent of decrease from 310 to 140. Round to the nearest tenth of a percent if necessary.

Mathematics

1 answer:

JulijaS [17]2 years ago

4 0

54.8% I think I'm not sure

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4 is less than w, and 8 is greater than or equal to w

sesenic [268]

Answer:

4 < w

8 > w

The greater than sign would have a line under it.

Step-by-step explanation:

7 0

2 years ago

If a/b < c/d with b > 0, d > 0, prove that a+c / b+d lies between the two fractions a/b and c/d .

Tems11 [23]

Divide through everything by b :

$\dfrac{a+c}{b+d} = \dfrac{\dfrac ab + \dfrac cb}{1 + \dfrac db}$

Since a/b < c/d, it follows that

$\dfrac{a+c}{b+d} < \dfrac{\dfrac cd+\dfrac cb}{1 + \dfrac db}$

Multiply through everything on the right side by b/d to get

$\dfrac{a+c}{b+d} < \dfrac{\dfrac{bc}{d^2}+\dfrac cd}{\dfrac bd+1} = \dfrac{\dfrac cd\left(\dfrac bd+1\right)}{\dfrac bd+1} = \dfrac cd$

and so (a + c)/(b + d) < c/d.

For the other side, you can do something similar and divide through everything by d :

$\dfrac{a+c}{b+d} = \dfrac{\dfrac ad + \dfrac cd}{\dfrac bd + 1}$

and a/b < c/d tells us that

$\dfrac{a+c}{b+d} > \dfrac{\dfrac ad + \dfrac ab}{\dfrac bd + 1}$

Then

$\dfrac{a+c}{b+d} > \dfrac{\dfrac ab + \dfrac{ad}{b^2}}{1 + \dfrac db} = \dfrac{\dfrac ab\left(1+\dfrac db\right)}{1 + \dfrac db} = \dfrac ab$

and so (a + c)/(b + d) > a/b.

Then together we get the desired inequality.

5 0

2 years ago

Select transform to change the drawing of the figure. Which expression could be used to find the combined area of the right and

Tems11 [23]

Answer: B aka (3’2) + (3’2)

Step-by-step explanation:

I got it right on Edge 2021, good luck! Also if right, can you please mark Brainliest?

4 0

2 years ago

You randomly choose a tile. Without replacing the first tile, you choose a second tile. Find the probability of the compound eve

ElenaW [278]

1/9
The only multiple of 4 is 4 & it is less than 7.

7 0

2 years ago

Read 2 more answers

The angle measurements in the diagram are represented by the following expressions.

aliya0001 [1]

Angle a and b are supplementary angles which means that when added they equal 180.
so we must set our equation equal to 180.
8x+74+2x+56=180
which simplifies to 10x+130=180
then subtract 130 from both sides.
10x=50
x=5

So we plug in 5 to find the measure of b.
2(5)+56=b
10+56=b
66=b
the measure of angle b is 66 degrees

8 0

3 years ago