5-2x=-4x-7 ???????????????????????

Answers

Answer 1

Answer:
My goodness ! What are you going to do when you
really need a question mark and you don't have any
because you used them all up ?

You said 5 - 2x = -4x - 7

Add 4x to each side:    5 + 2x =      -7

Subtract 5 from each side:    2x =   -12

Divide each side by 2 :    x =   -6

Answer 2

Answer: +2x on both sides
5=-2x-7
+7
12=-2x
/-2
-6=x

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What are two ways to write 7/3 as a mixed number

Answers

$2(1)/(3)$ which is actually $(7)/(3)$

Or just the equivalent fractions:

$2(2)/(6)$ = $(14)/(6)$ = $(7)/(3)$

one way is to divide

one winter day,the temperature ranged from a high 20°F to a low -25°F. By how many degrees did the temperature drop?

Answers

Answer:

$45^(\circ)F$

Step-by-step explanation:

We have been given that one winter day,the temperature ranged from a high 20°F to a low -25°F.

To find the degrees by which temperature dropped, we will find difference between the final temperature and initial temperature.

$-25^(\circ)F-20^(\circ)F=-45^(\circ)F$

Since our difference is negative, therefore, the temperature dropped 45 degrees Fahrenheit.

45 degrees. 20 - (-25)

Use the general rotation matrix and the unit circle or inverse trigonometric functions to find the angles of rotation for the following matrices.B=[-0.3090 0.9511]
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72
108
144

Answers

Answer:

108

Step-by-step explanation:

Hope this helps! :)

Answer:

108

Step-by-step explanation:

Edge 2020

Dave can paint the office by himself in 4 hours. Working with an associate, he can paint theoffice in 3 hours. How long would it take his associate to do it working alone?

Answers

Answer:

It would take 12 hours for his associate to do the complete work alone.

Step-by-step explanation:

Let 'x' be the hours taken by his associate working alone.

Given:

Time to paint the office by Dave is 4 hours.

Time to paint the office together is 3 hours.

Therefore, the part of work completed by Dave alone in 1 hour is $(1)/(4)$

Part of work completed by an associate in 1 hour is $(1)/(x)$

Now part of work completed by both in 1 hour is $(1)/(3)$

Therefore,

$(1)/(4)+(1)/(x)=(1)/(3)\n\n(1)/(x)=(1)/(3)-(1)/(4)\n\n(1)/(x)=(4-3)/(12)\n\n(1)/(x)=(1)/(12)\n\nx=12\ h$

Therefore, it would take 12 hours for his associate to do the complete work alone.

What is the simplified expression for:3 to the power of 3 times 3 to the power of three
_____________________________________
3 to the power of 4

Answers

81=3^4
I hope this helps! Good luck!

A patio in the shape of a semicircle has a diameter of 21 ft. What is the approximate area of the patio, rounded to the nearest square foot? Use 3.14 to approximate pi star times pi.

Answers

The formula of the area of a semi circle is half the area of the circle

$( \pi r^2)/(2)$

Diameter = 21 ft
Radius = $(d)/(2)$ = $(21)/(2)$ = 10.5 ft

Area = $( \pi (10.5)^2)/(2)$
= $(110.25 \pi )/(2)$
= $(110.25 * 3.14)/(2)$ (3.14 as $\pi$ )
= $(346.185)/(2)$
=173.0925 ft² ≈ 173.1 ft² ≈ 173 ft²
To the nearest square foot : 173 ft²

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does it matter which way you subtract the values when you are finding distance between two numbers on a number line