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stich3 [128]
3 years ago
8

If using the method of completing the square to solve the quadratic equation x^2-19x+9=0x

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
7 0
19/2 = 9.5
(9.5)^2 = 90.25 = 9 + 81.25

x^2 - 19x + 9 = 0
x^2 - 19x + 90.25 - 81.25 = 0
(x - 9.5)^2 = 81.25
x - 9.5 = +/-sr(81.25)

I will let you finish from here
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F(x)=3x+2 and g(x)=-2x-4, find h(x)= f(x)-g(x)
Katena32 [7]


substitute for your equation;

h(x) = f(x) - g(x)

h(x) = (3x + 2) - (-2x -4)

h(x) = 3x + 2 + 2x + 4 (minus and minus = addition)

h(x) = 3x + 2x + 2 + 4 (combine like terms)

h(x) = 5x + 6

Hope that helps! :D

8 0
3 years ago
Caleb and Landon work at a dry cleaners ironing shirts. Caleb can iron 30 shirts per hour, and Landon can iron 15 shirts per hou
Hitman42 [59]

Answer:

The system of the equations is x - y = 2, 2x + y = 22, where x is the number of hours that Caleb worked and y is the number of hours that Landon worked

Step-by-step explanation:

Assume that Caleb worked for x hours and Landon worked for y hours

∵ Caleb worked for x hours

∵ Landon worked for y hours

∵ Caleb worked 2 more hours than Landon

→ That means Caleb hours = Landon hours + 2

∴ x = y + 2

→ Subtract y from both sides

∴ x - y = 2 ⇒ (1)

∵ Caleb can iron 30 shirts per hour

∵ Landon can iron 15 shirts per hour

∵ They ironed 330 shirts between them

→ Multiply x by 30 and y by 15, then equate their sum by 330

∴ 30x + 15y = 330

→ Divide both sides by 15 to simplify the equation

∴ 2x + y = 22 ⇒ (2)

The system of the equations is x - y = 2, 2x + y = 22, where x is the number of hours that Caleb worked and y is the number of hours that Landon worked

7 0
3 years ago
-a = -24<br><br> Please explain
allsm [11]
This means a has a value of 24.
5 0
3 years ago
Read 2 more answers
What is 529.062 round to the nearest tenth?
Paraphin [41]
Salutations!

What is 529.062 round to the nearest tenth?

To round the number to the nearest tenth, you need to know whether the number is greater than 5 or lesser than 5. If its greater than 5, you need to round up. If its lesser than 5, you need to know round down.

In the number, 529.062, the number next to the tenth place is 6. 6 is greater than 5, therefore, you need to add +1 to the tenth place making it 1.

529.062 round to the nearest tenth ≈ 529.1.

Hope I helped (:

Have a great day!
3 0
4 years ago
The opposite angles of a rhombus are congruent.<br> True<br> False
choli [55]
A rhombus is considered a parallelogram since a parallelogram is defined as any figure having four sides with opposite sides parallel. <span>On a basic parallelogram, opposite angles are congruent. Therefore, the correct answer to the given statement above would be TRUE. Hope this answer helps. </span>
5 0
3 years ago
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