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jok3333 [9.3K]
3 years ago
7

3x + 15 2. Find the value of X

Mathematics
1 answer:
hram777 [196]3 years ago
7 0

Answer:

x=-5 :)

Step-by-step explanation:

3x+15=0

    -15    -15

3x=-15

/3     /3

x=-5

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Find the value of n in each of the following proportions.
Setler79 [48]

Answer:

24

Step-by-step explanation:

18/n = 21/28                    You can cancel, but calculators make that unnecessary.   Cross multiply

21n = 18 * 28

21n = 504                         Divide by 21

n = 504 / 21

n = 24

==================

12/16 = n / 64                    Cross Multiply

16n = 12 * 64

16n = 768                         Divide by 16

n = 768/16

n = 48

7 0
3 years ago
A line has a slope of -7 and a y-intercept of 3. What is its equation in slope-intercept form?​
katovenus [111]

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y=-7+3

Step-by-step explanation:

7 0
3 years ago
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Jenna and Corey solved the equation, 4(x+4) = 2( 2x+5) +6, and came up with two different solutions.
iogann1982 [59]

Answer: C

Step-by-step explanation:

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6 0
3 years ago
You are planning on purchasing a new car and have your eye on a specific model. You know that new car prices are projected to in
olya-2409 [2.1K]

Answer:

A

Step-by-step explanation:

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5 0
3 years ago
Given the equation 3x - 4y = 8, which equation below would cause a consistent-dependent system?
Len [333]
3x - 4y = 8

y = mx + b ; m is the slope ; b is the y-intercept

-4y = -3x + 8
y = -3x/-4 + 8/-4
<u>y = 3/4 x - 2</u>

Need to check if the given choices have the same slope.

3x + 4y = -8
4y = -3x - 8
y = -3/4 x - 8/4 = -3/4 x - 2

6x - 8y = 12
-8y = -6x  + 12
y = -6/-8 x + 12/-8
y = 3/4 x - 1 1/2

9x - 12y = 24   This equation would cause a consistent-dependent system
-12y = -9x + 24
y = -9/-12 x + 24/-12
<u>y = 3/4 x - 2</u>  

16x + 12y = -10
12y = -16x - 10
y = -16/12 x - 10/12
y = -1 1/3 x - 5/6

4 0
3 years ago
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