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azamat
3 years ago
6

If x2 - 4 = 45, then x could be equal to 9 3 5 -7 -4

Mathematics
1 answer:
Ivanshal [37]3 years ago
5 0
Transpose the constant on the left hand side of the equation to the right side. The equation becomes x² = 45 + 4, 
                                               x² = 49
                                           x = sqrt(49) 
                                            x = 7 and x = -7
Only -7 is on the choices. Thus, the answer is x = -7.
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You are using 0.05 gallons per mile of a SUV gas tank that holds 16 gallons. y = - 0.05x + 16. (Or, if you wish you may use
asambeis [7]
Here, we just use the following x values and put them into the equation.

y = - 0.05x + 16
y = -0.5(0) + 16
y = 16

y = - 0.05x + 16
y = -0.5(160) + 16
y = -80 + 16
y = -64

y = - 0.05x + 16
y = -0.5(320) + 16
y = - 160 + 16
y = -144

Now, to set up the table, you could list the x values and the y values. 

x values :- 0,160, 320
y values:- 16, -64, -144


6 0
3 years ago
Read 2 more answers
a rectangular corn hole area at the recreation center has a width of 5 feet and a length of 10 feet. if a uniform amount is adde
harkovskaia [24]
Let
x-------------> amount added <span>to each side
</span>A-------------> area increased----------> 84 ft²

we know that
A=(10+x)*(5+x)=84-----------> 10*5+10*x+5*x+x²
50+15x+x²=84----------> x²+15x-34=0
<span>solving the second order equation
</span>x1=-17
x2=2

 the answer is x=2 ft
3 0
3 years ago
Read 2 more answers
HELP PLEASE!!!
Hitman42 [59]

Answer:

1. false

2. 17 times

Step-by-step explanation:

The sum of all the probabilities of outcomes of an event is equal to 1

2.  A die has  1,2,3,4,5,6

P(4) = number of 4's/ total numbers

       = 1/6

Multiply the number of roll's by the probability of getting a 4

100 *1/6 = 50/3 = 16 2/3

This is approximately 17

3 0
3 years ago
The sum of 9and -16 increased by 4
LenaWriter [7]

Answer:

-3

Step-by-step explanation:

The statement is,

→ Sum of 9 and -16 increased by 4

The equation will be,

→ {9 +(-16)} + 4

→ (9 - 16) + 4

→ -7 + 4

→ [ -3 ]

Hence, the solution is -3.

7 0
2 years ago
Give me the answers to thissss plssss rnnnn asapppp!!!!
soldier1979 [14.2K]

\\ 1. (3x ^{2}  + 2xy + 7) - (6x ^{2}  - 4xy + 3) \\  = 3x ^{2}  + 2xy + 7 - 6x ^{2}  + 4xy - 3 \\  = 3x ^{2}  -  {6x}^{2}  + 2xy + 4xy + 7 - 3 \\  =   { - 3x}^{2}  + 6xy + 4 \\ 2. \:  {9x}^{2}  - 2x + 3 - ( {4x}^{2}  + 7x - 5) \\  = 9x ^{2}  - 2x + 3 - 4x ^{2}  - 7x  + 5 \\  = {9x}^{2}  -  {4x}^{2}  - 2x - 7x + 3 + 5 \\  =  {5x}^{2}  - 9x  + 8 \\ 3. \:  {x}^{2}  - 5x + 6 \\  =  {x}^{2}  - (3 + 2)x + 6 \\   = {x}^{2}  - 3x - 2x + 6 \\  = x(x - 3) - 2(x - 3) \\  = (x - 3)(x - 2) \\ hope \: it \: helps \\ good \: luck \: on \: your \: assignment

4 0
3 years ago
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