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Vladimir79 [104]
2 years ago
10

What is the value of x in the equation x+7=−213 x+7=−2

Mathematics
1 answer:
MariettaO [177]2 years ago
6 0

Answer:

Step-by-step explanation:

⅓x + 7 = -2

isolate the x term by subtracting 7 from both sides

⅓x = -9

Multiply both sides by 3

x = -27

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Simplify 2m - [n - (m - 2n)]. -3m - n 3m - n -3m - 3n 3m - 3n
zhenek [66]

Answer:

3m-3n

Step-by-step explanation:

We want to simplify the expression;

2m - [n - (m - 2n)].

We expand the parenthesis to obtain;

2m - (n - m + 2n)

2m - ( - m + 3n)

Expand further to get;

2m +m -3n

Combine the first two terms;

3m-3n

4 0
3 years ago
Read 2 more answers
Given that f(x) = x2 + 1 and g(x) = -3, multiply the functions (gºf)(x).
stich3 [128]

Answer:

(g\cdot f) =  -3x^2-3

Step-by-step explanation:

f(x) = x^2 + 1

g(x) = -3

The problem state to multiply the function f and g so the symbol seems to be incorrect.

We actually want to calculate

g(x)  f(x) =gf(x) =  (-3)  \cdot (x^2+1)= -3x^2-3

Note

g\circ f(x)=g(f(x))=g(x^2+1)=-3

3 0
2 years ago
A wheel rotated for 2 minutes. If it makes 3 & 2/7 rotations each minute, how many rotations does it make?
Kryger [21]

2 times 3 & 2/7 = 6 & 4/7

3 0
3 years ago
At a particular restaurant, each mini hotdog has 100 calories and each slider has 200 calories. A combination meal with mini hot
qwelly [4]

Answer:

The number of sliders is 2 and the number of hot dogs is 8.

Step-by-step explanation:

Since at a particular restaurant, each mini hotdog has 100 calories and each slider has 200 calories, and a combination meal with mini hotdogs and sliders is shown to have 1200 total calories and 4 times as many mini hotdogs as there are sliders, in order to determine the number of mini hotdogs in the combination meal, X, and the number of sliders in the combination meal, Y, the following calculation must be performed:

2X + Y = 1200

800 + 400 = 1200

800/100 = 8

400/200 = 2

Thus, the number of sliders is 2 and the number of hot dogs is 8.

7 0
2 years ago
Write the following phrase as a variable expression. Use x to represent "a number" the sum of a number and seventeen
SashulF [63]

Answer:

x+17

Step-by-step explanation:

Hi there!

Let x represent "the number".

The sum of a number and seventeen

⇒ x+17

I hope this helps!

3 0
2 years ago
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