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omeli [17]
3 years ago
9

In the equation -2(2-r)=4(5-r) what is r?

Mathematics
1 answer:
valina [46]3 years ago
8 0
-2(2-r)=4(5-r)\\
-4+2r=20-4r\\
6r=24\\
r=4
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(9x^(2)+4x+2)-:(3x+x-2)
earnstyle [38]

Answer:

= - 9x2+4x+2/4x-2

Step-by-step explanation:

Remove parentheses

its blank we need to find a number

step 1: = -/4x-2 (9x2+4x+2)

step 2: multiply fractions and there is your answer

9x2+4x+2/4x-2

6 0
3 years ago
Pls help for 27b!!!!!!!
rodikova [14]

Step-by-step explanation:

\beta

is a root of the quadratic

4 {x}^{2}  - 10x + 5

This quadratic isn't factorable so use the quadratic formula

- b +  -  \sqrt{ \frac{b {}^{2}  - 4ac }{2a} }

The plus and minus sign after b means we going to have two roots.

The roots are

\frac{5 +  \sqrt{5} }{4}

and

\frac{5 -  \sqrt{5} }{4}

We subsitue those values for Beta.

27a.

\frac{5}{2}

27b.

25

6 0
3 years ago
Find the value of z in the similar figures (round to the nearest tenth)
MrRa [10]
As they are similar figures,we can use the ratio of the side to find out the value of z.

The only side that both have the value indicated is 4 and 6,therefore we would use it to find the ratio.

The eqaution would be:
6/4 = z/8
3/2 = z/8
3×8 = 2z
z = 24/2
z = 12

Thus the value of z is 12.

Hope it helps!
4 0
3 years ago
Please HELP!!!!
dedylja [7]
Absolute value equations have more than one solution because when the answer is in abs. value, it is positive, so there could be a negative answer and it would still be positive. For example |-5|=5 and |5|=5 as well. 
4+|2x|=-1 would have no solution because you cannot have the equation equal a negative since the 2x is in absolute value. 
8 0
4 years ago
Another submarine descent can be represented as y= -240 x where y is the elevation and x is time in hours. How long will it take
Juli2301 [7.4K]

Answer:e

Step-by-step explanation:

The equation for the submarine is given as y =-240x

Where y is the distance of the descent

x is the time in hours

and -240 is the rate of distance per unit time

To calculate how long it will take this submarine to reach the descent

x = y /-240

8 0
3 years ago
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