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shepuryov [24]
3 years ago
15

14 POINTS 7x - 3 = 18

Mathematics
2 answers:
Sunny_sXe [5.5K]3 years ago
8 0
First is for you to try to leave X alone on the left side to find its value.
Step 1: -3 is moved to the right side as a addition so the equation now should be 7x=21.
Step 2: We need to leave X alone so we also move 7 to the right side as a division. Your equation should look like this x=21/7, divide it and the result is x=3
Hope This Helps You
Svetlanka [38]3 years ago
5 0
Subtract 3 first so it would be 7x=15
then divide by 7 so x would be approximately 2.14
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Show how to find the roots (zeros) of the function in the picture below.
Vikki [24]

Answer:

The roots (zeros) of the function are:

x=5,\:x=-8

Step-by-step explanation:

Given the function

f\left(x\right)=x^2+3x-40

substitute f(x) = 0 to determine the zeros of the function

0=x^2+3x-40

First break the expression x² + 3x - 40  into groups

x² + 3x - 40 = (x² - 5x) + (8x - 40)

Factor out x from x² - 5x:  x(x - 5)

Factor out 8 from 8x - 40:  8(x - 5)

Thus, the expression becomes

0=x\left(x-5\right)+8\left(x-5\right)

switch the sides

x\left(x-5\right)+8\left(x-5\right)=0

Factor out common term x - 5

(x - 5) (x + 8) = 0

Using the zero factor principle

if ab=0, then a=0 or b=0 (or both a=0 and b=0)

x-5=0\quad \mathrm{or}\quad \:x+8=0

Solve x - 5 = 0

x - 5 = 0

adding 5 to both sides

x - 5 + 5 = 0 + 5

x = 5

solve x + 8 = 0

x + 8 = 0

subtracting 8 from both sides

x + 8 - 8 = 0 - 8

x = -8

Therefore, the roots (zeros) of the function are:

x=5,\:x=-8

6 0
2 years ago
Solve the system of equations algebraically. Verify your
xz_007 [3.2K]

Answer:

The solution is the point (0.5,-3)

Step-by-step explanation:

we have

y=4x-5 ----> equation A

y=-3 ----> equation B

Solve the system by substitution

Substitute equation B in equation A

-3=4x-5

Solve for x

Adds 5 both sides

-3+5=4x

2=4x

Divide by 4 both sides

x=0.5

therefore

The solution is the point (0.5,-3)

<em>Verify your  answer using the graph</em>

using a graphing tool

Remember that the solution of the system of equations is the intersection point both graphs

The intersection point is (0.5,-3)

therefore

The solution is the point (0.5,-3)

see the attached figure

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3 years ago
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How do you turn 0.23 into a percent
Hitman42 [59]

Answer:

Step-by-step explanation:

you multiply it with 100

0.23 x 100 = 23%

5 0
3 years ago
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Two large numbers of the Fibonacci sequence are f50=12,586,269,025 and f51=20,365,011,074. What is the approximate value of the
GenaCL600 [577]

jsut divide them
12,586,269,025 and 20,365,011,074
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7 0
3 years ago
WILL GIVE BRAINIEST!!!!!!!!
vlabodo [156]
The answer is A. Hope this helps!
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