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Gala2k [10]
2 years ago
6

Solve the following equations and check your solution using substitution.

Mathematics
2 answers:
Ipatiy [6.2K]2 years ago
8 0

Answer:

Q1)   x =2         Q2)     x = 11/9

Step-by-step explanation:

Q1)   6 - 5x = 16                  check : -5(2) = -10

-6         -6                     6 -- 10 =  6+ 10 = 16

-5x = 10                         Q2)   4 - 9x = -7

-x = -2                                    -4           -4  

x = 2                                      -9x = - 11

--------------                               -x = -11 /9    ----->  x = 11/9

Harrizon [31]2 years ago
3 0

Answer: 1. x=-2; 2. x=\frac{11}{9}

Step-by-step explanation :

1.

6-5x=16\\6-5x-6=16-6\\-5x=10\\\frac{-5x}{-5}=\frac{10}{-5}\\x=-2

2.

4-9x=-7\\4-9x-4=-7-4\\-9x=-11\\\frac{-9x}{-9}=\frac{-11}{-9}\\x=\frac{11}{9}

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Lynn starts with $120 in her savings. Each week her brother gives her $16 to do his homework, which Lynn adds to her savings. Cr
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Answer:

16x+120=Total savings

Step-by-step explanation:

the 16x represents how much money you earn the x is the number of weeks you did the homework and the plus 120 is the base

8 0
3 years ago
if you subtract 17 from my number and multiply the difference by -6 the results is -138 what is Sarah's number
likoan [24]

Answer:

40

Step-by-step explanation:

let the unknown be y (x is used as times(multiplication) )

(y-17)x-6=-138

add /-6 to both sides

y-17x-6/-6=-138/-6

y-17=23

make y independent/add 17 to both sides

y-17+17=23+17

y=40

or in an easier way

-138/-6 =23

23+17=40

simply reversing the question to get the answer

7 0
3 years ago
Which vectors represent the reflection of the vector <3, -7> across the x-axis? A. [3/7} B. [-3/7] C. <-3, 7> D. &lt
Alexandra [31]

Answer:

D)    < 3, 7)>

Step-by-step explanation:

<u><em>Explanation</em></u>:-

Given that the vector < 3 , -7 >

Given the vector reflection across the x-axis

                   (x,y) → (x , -y)

The vector < 3,-7> →< 3, -(-7)>

                  < 3,-7> →< 3, 7)>

3 0
3 years ago
Read 2 more answers
12=y-3y what's the answer
nevsk [136]
12=y-3y  Combine like terms
12=-2y  Divide
y=-6
8 0
3 years ago
Read 2 more answers
How to do -4x+5y+6z?
Gala2k [10]

Answer:

There are no like terms to therefore the answer is -4x+5y+6z

3 0
3 years ago
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