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3 years ago

Simplify (8j3 − 3j2 + 5) − (4j3 + 8j2 + 7j − 6).

2 answers:

7 0

So u want to distribute the - to the second equation.

8j3 - 3j2 + 5 -4j3 - 8j2 -7j + 6
Then combine like terms. Don't forget their signs!
4j^3 - 11j^2 -7j +11
That's ur final answer. Hope this helps!

storchak [24]3 years ago

4 0

4j^3-11j^2-7j+11, hope this helps

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Serenity picked 75% of the apples of a tree in her backyard. If she picked 30 apples, how many apples were on the tree to begin

Stells [14]

Given:

Serenity picked 75% of the apples of a tree in her backyard.

She picked 30 apples.

To find:

The number of apples on the tree in the beginning.

Solution:

Let x be the number of apples on the tree in the beginning.

Serenity picked 75% of the apples of a tree in her backyard.

Number of apples picked = 75% of x

= $\dfrac{75}{100}x$

= $\dfrac{3}{4}x$

She picked 30 apples.

$\dfrac{3}{4}x=30$

Multiply both sides by 4.

$3x=4\times 30$

$3x=120$

Divide both sides by 3.

$x=\dfrac{120}{3}$

$x=40$

Therefore, the number of apples on the tree in the beginning is 40.

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3 years ago

Suppose that y varies inversely with x, and y=3 when x=4.

yawa3891 [41]

When y varies inversely as x it can be expressed as follows:

$\frac{1}{x}\text{ }\propto\text{y}$

If we write the general equation for this

$y=\frac{A}{x}$

When y=3 and x=4 we can calculate de value of A

$\begin{gathered} x=4 \\ y=3 \\ 3=\frac{A}{4} \\ A=4\cdot3 \\ A=12 \end{gathered}$

Then the equation that describes an inverse variation between x and y is_

$y=\frac{12}{x}$

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1 year ago

What are the exact values of the six trigonometric functions for -7π/6 radians?

Artyom0805 [142]

Answer:

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2 years ago

What is the value of y when y = 4x - 1 and x = 7/2

babunello [35]

The answer to y= 4x- 1 is 13. substitute 7/2 at x and do 4 times 7/2 minus 1.

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4 years ago

If there are 1000 grams in a kilogram in 454 grams in a pound how many pounds are there in a kilogram?

MaRussiya [10]

Answer:

2.2

Step-by-step explanation:

A kilogram is 2.2lbs so if you weigh yourself and it says you weigh 60k then you multiply 60 times 2.2 you get 132lbs.

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4 years ago