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3 years ago

2.) Solve each equation by subtracting a number from each side to isolate x.

2 answers:

5 0

a) x+5= 12

x + 5 - 5 = 12 - 5
x = 12 - 5
x = 7

b) 15 + x + 6
15 - 6 = x + 6 - 6
15 - 6 = x
9 = x

c) 19 = 7 + x
19 - 7 = 7 - 7 + x
19 - 7 = x
12 = x

Alex17521 [72]3 years ago

3 0

Hey there, Lets solve this problem together.

Equation (A) = $x+5= 12$

 $x + 5 - 5 = 12 - 5

x = 12 - 5

x = 7$

Equation (B) = $15= x+6$

$15 - 6 = x + 6 - 6

15 - 6 = x

9 = x$

Equation (C) = $19= 7+x$

$19 - 7 = 7 - 7 + x

19 - 7 = x

12 = x$

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I need help i tried to do this but can't get it.

Ipatiy [6.2K]

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3 years ago

What is the value of the expression? –83

QveST [7]

Value of an expression 83
in where 8 is the base number and 3 is the exponent.
To get the answer, simply multiply the base number as many times as the exponent says.
Since the exponent is 3 and base is 8, we need to multiply 8 three times.
=> 8 x 8 x 8
=> 512 
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to check if our answer is correct, simply divide 512 by 8 twice.
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3 years ago

What is the slope of a line passing they (3,4) and (5,8)?

seraphim [82]

Answer:

The answer is: m = 2, slope is 2.

Step-by-step explanation:

Use the equation for slope:

m = (y - y1)/(x - x1)

Place the values in the equation:

m = (4 - 8)/(3 - 5)

m = -4/-2

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5 0

4 years ago

Y=-2x-3 and 7x-5y=-6. solve by substitution

KatRina [158]

Answer:

Step-by-step explanation:

y = -2x - 3

7x - 5y = -6

7x - 5(-2x - 3) = -6

7x + 10x + 15 = -6

17x = -21

x = -21/17

y = -2(-21/17) - 51/17

y = 42/17 - 51/17

y = -9/17

(-21/17, -9/17)

8 0

3 years ago

The dollar value of a car is a function f, . of the number of years, t, since the car was purchased. Thefunction is defined by t

Fofino [41]

Given the following question:

$f(t)=12000\times(\frac{3}{5})^t$

Part A:

I believe that the 12,000 tells us the orginal price of the car, or the price the car was purchased for. 12000 is the orginal price of the car.

Part B:

I believe that the 3/5 tells us the decline in value each year after the car has been purchased. Which is why t is the exponet is t was 2 you would have to multiply 3/5 by itself twice and then multiply it by 12000 which further decreases it's value. 3/5 represents the decline in value after T years.

Part C:

t = number of years

t = 3

$\begin{gathered} f(t)=12000\times\frac{3}{5^{}}^3 \\ \frac{3}{5}^3=\frac{3}{5}\times\frac{3}{5}\times\frac{3}{5} \\ \frac{3}{5}\times\frac{3}{5}=\frac{9}{25} \\ \frac{9}{25}\times\frac{3}{5}=\frac{27}{125} \\ 12000\times\frac{27}{125}=2592 \\ v=2592 \end{gathered}$

Value of the car after three years will be 2592.

4 0

2 years ago