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3 years ago

How to find all real solutions

Mathematics

1 answer:

AlladinOne [14]3 years ago

7 0

$\bf \sqrt{\sqrt{x-5}+x}=5\leftarrow \textit{squaring both sides}
\\\\
\sqrt{x-5}+x=25\implies \sqrt{x-5}=25-x\leftarrow \textit{squaring both sides}
\\\\
x-5=(25-x)^2\implies x-5=625-50x+x^2
\\\\
0=x^2-51x+630\implies 0=(x-30)(x-21)$

and surely you'd know what the roots are

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20 POINTS! The following graph shows the amount of money Jonah earns when he babysits for the family who lives next door. Based

katrin2010 [14]

Answer:

The equation e = 4 h can be used to describe this situation.

Jonah earns $20 to babysit for 5 hours.

Step-by-step explanation:

When Jonah babysits one hour, he earns $7.50.

looking at the graph we see at 1 hour he earns 4 dollars false

The equation e = 4 h can be used to describe this situation.

The slope is 4 so y = 4x e = 4h would also work true

Jonah earns $20 to babysit for 5 hours.

Using our equation from above

e = 4*5 = 20 true

The number of hours Jonah works depends on how much he earns.

This would be false

The dependent variable is on the y axis. The amount he earns depends on how much he works

3 0

3 years ago

5. Solve the inequality. -4(3-X) > 8 a. -5 b. x < -5 c. 5< x d. x < 5

Ostrovityanka [42]

Answer:

x >5

Step-by-step explanation:

-4(3-X) > 8

Divide by -4, remembering to flip the inequality

-4/-4(3-X) < 8/-4

3-x < -2

Subtract 3 from each side

3-x-3 < -2-3

-x <-5

Divide by -1, remembering to flip the inequality

x >5

3 0

3 years ago

Read 2 more answers

The basketball team scored 82 points from 2-point and 3-point baskets. They make 38 baskets altogether. Let a represent the numb

Ivan

2a+3b=82
a+b=38
These are the two equations you need to solve for a and b

6 0

3 years ago

In the right triangle shown, DF=EF=3DF=EF=3D, F, equals, E, F, equals, 3.

timofeeve [1]

Answer:

DE = 4.24

Step-by-step explanation:

The diagram is not shown; However, the question can still be solved without the diagram.

Having said that,.

Given that

DF = EF = 3

This implies that DE is the hypothenus and will be solved using Pythagoras theorem.

DE² = EF² + DF²

Substitute 3 for EF and DF

DE² = 3² + 3²

DE² = 9 + 9

DE² = 18

Take Square Root of both sides

DE = √18

DE = 4.242640687119285

DE = 4.24 (Approximated)

8 0

3 years ago

Proving lines parallel determine the value of X

Maslowich

when both l and m are parallel then 

(4x+7) = (6x-63)

-2x = -70

-x = -70/2

-x = -35

x = 35

hope it helps and ur day will full of happiness

3 0

3 years ago