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3 years ago

Find the percentage change from 75 to 50.

Mathematics

2 answers:

Alex777 [14]3 years ago

8 0

Answer:

-25%

Step-by-step explanation:

hope this helps!! please mark brainliest.

Llana [10]3 years ago

5 0

Step-by-step explanation:

50÷75 is .6667. that means that 50 is 66.7 percent of 75.

100 minus 66.7 is 33.3. It is a 33.3 percent change

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Simplify the expression(a4−6a2b2+ b4)−(−2a4+5a2b2+ 3b4) and hence, find its value for a = 2and b = −1.

ELEN [110]

Answer:

(a) $3a^4 - 11a^2b^2 -2b^4$

(b) $3a^4 - 11a^2b^2 -2b^4= 2$

Step-by-step explanation:

Given

$(a^4 - 6a^2b^2+ b^4) - (-2a^4+5a^2b^2+ 3b^4)$

Solving (a): Simplify

$(a^4 - 6a^2b^2+ b^4) - (-2a^4+5a^2b^2+ 3b^4)$

Open brackets

$a^4 - 6a^2b^2+ b^4 +2a^4-5a^2b^2- 3b^4$

Collect Like Terms

$a^4 +2a^4- 6a^2b^2-5a^2b^2+ b^4 - 3b^4$

Simplify Like Terms

$3a^4 - 11a^2b^2 -2b^4$

Solving (b): Simplify when a = 2 and b = -1

$3a^4 - 11a^2b^2 -2b^4$

$3*(2)^4 - 11*(2^2)*(-1)^2 -2*(-1)^4$

$3 * 16 - 11 * 4 * 1 - 2 * 1$

$48 - 44 - 2$

$= 2$

Hence:

$3a^4 - 11a^2b^2 -2b^4= 2$

4 0

3 years ago

The region bounded by the given curve is rotated about the specified axis. Find the volume V of the resulting solid by any metho

GalinKa [24]

X^2+(y-2)^2=4 is a circle centered at (0,2) with radius 2.
Thus, when you rotate it around the y-axis (around x=0),
you get a sphere with radius 2.

((which is centered at (x,y,z)=(0,2,0), if you take y to be
the vertical axis ... not that you need to know this for volume))

--------------------------------------------------------------
Volume of a sphere formula: V = (4/3)πr^3.

5 0

3 years ago

(02.06 MC) Figure ABCD is a rhombus, and m∠BAE = 9x + 2 and m∠BAD = 130°. Solve for x. Rhombus ABCD with diagonals AC and BD and

SVEN [57.7K]

An angle bisector divides an angle into equal parts.

<em>The value of x is 7</em>

The given parameters are:

$\angle BAE = 9x + 2$

$\angle BAD = 130^o$

Line AE is the angle bisector of $\angle BAD$

This means that:

$\angle BAD = 2 \times \angle BAE$

So, we have:

$130 = 2 \times (9x + 2)$

Divide both sides by 2

$65 = 9x + 2$

Subtract 2 from both sides

$63 = 9x$

Divide both sides by 9

$7 = x$

Rewrite as:

$x = 7$

Hence, the value of x is 7

Read more about angle bisectors at:

brainly.com/question/12896755

3 0

3 years ago

What is the equation of a line passing through the point (4,-1) and parallel to the line whose equation is 2y-x=8

Ksivusya [100]

9514 1404 393

Answer:

2y -x = -6

Step-by-step explanation:

You can use the same x- and y-coefficients. You just have to change the constant on the right. Put the point values into the left expression to see the new constant.

2y -x = 2(-1)-(4) = -6

The parallel line is ...

2y -x = -6

4 0

4 years ago

Guys pretty pls help :3

dedylja [7]

Answer:

See description.

Step-by-step explanation:

The first way you could use 60/5 is you could say the 60 students need to be divided into 5 buses. The second way you could use 60/5 is you could do 60 students divided into five groups of areas.

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3 years ago