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hram777 [196]
2 years ago
5

Solve the equation by completing the square

Mathematics
1 answer:
wlad13 [49]2 years ago
6 0

Answer:

Below.

Step-by-step explanation:

x^2 + 4x  = 18

x^2 + 4x + (2)^2 = 15 + 2^2

x^2 + 4x + 4 = 18 + 4

(x + 2)^2 = 22

x  + 2 = +/- √22

x = -2 + √22 and x =  -2 + √22

x = 2.7  and -6.7  to nearest tenth.

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PLS HURRY
Aneli [31]

Given:

The table of values.

Hours (h)        Dollars (d)

     1                       42

     2                      84

     3                     126

     4                     168

     5                       ?

To find:

The correct statements about the table.

Solution:

From the given table it is clear that,

1\times 42=42

2\times 42=84

3\times 42=126

4\times 42=168

This pattern can be defined as

h\times 42=d

Multiply h by 42 to get d. So, option A is correct.

Using this pattern, we get

5\times 42=210

The missing value in the last row is 210. So, option D is correct.

From the given table it is clear that the rate of change is $42 per hour because dollar is increasing by 42 in every hour.

A real-world situation that is represented in the table is “Richard is a video game designer and earns $42 per hour.”

Therefore, the option E is correct.

3 0
3 years ago
Read 2 more answers
A bike store sells scooters at a 54% markup if the store sells each scooter for $69.30 then what is their non-markup price
liq [111]

Answer:

$45

Step-by-step explanation:

1.54(x) = 69.3

Divide both sides by 1.54

x = 45

8 0
3 years ago
The mean and median sales prices of new homes sold in the United States in February 2016 were $ 217822 and $ 244614 , respective
anastassius [24]

Answer:

Mean: $217,822

Median: $244,614

Step-by-step explanation:

The mean and median sales prices of new homes sold in the United States in February 2016 were $ 217822 and $ 244614 , respectively.

Mean and median, then the term respectively.

This means that first comes the mean, and then the median.

So

Mean: $217,822

Median: $244,614

6 0
3 years ago
Read 2 more answers
I have been failing cause of brainly i could go to a elite school but im on brainly so much i miss assignments :)​
VARVARA [1.3K]

Answer:

ok dont get addicted

Step-by-step explanation:

7 0
4 years ago
Please someone tell me the answers to these I dont remember how to do it ​
Delvig [45]

Answer:

1)  (3 - 6x)(-8) = (-8)(3) - (-8)(6x) = -24 - (-48x) = -24 + 48x = 48x - 24

2) (-12)(2x - 3) = (-12)(2x) - (-12)(3) = -24x - (-36) = -24x + 36 = 36 -  24x

3) (10 - 2x)9 = (9)(10) - (9)(2x) = 90 - 18x

4) (-5)(11x - 2) = (-5)(11x) - (-5)(2) = -55x - (-10) = -55x + 10 = 10 - 55x

5) (1 - 9x)(-10) = (-10)(1) - (-10)(9x) = -10 - (-90x) = -10 + 90x = 90x - 10

6) (-6)(x + 8) = (-6)(x) + (-6)(8) = -6x + (-48) = -6x - 48

7) (-4 + 3x)(-8) = (-8)(-4) + (-8)(3x) = 32 + (-24x) = 32 - 24x

8) (-5)(1 - 11x) = (-5)(1) - (-5)(11x) = -5 - (-55x) = -5 + 55x = 55x -5

9) (-12x + 14)(-5) = (-5)(-12x) + (-5)(14) = 60x + (-70) = 60x - 70

Step-by-step explanation:

The distributive property is a(b + c) = ab + ac

8 0
2 years ago
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