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3 years ago

Evaluate the expression x-9=3 (solve)

Mathematics

2 answers:

Sholpan [36]3 years ago

8 0

Answer:

x-9=3

x=3+9

x=12

Step-by-step explanation:

hope it helps

Viefleur [7K]3 years ago

7 0

Answer:

x=12

Step-by-step explanation:

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3 years ago

What is the solution of the system. Use the substution method. 3x+2y=11, x-2=-4y

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Answer:

$x=\frac{10}{3}$ and $y=\frac{1}{2}$

Step-by-step explanation:

To use the substitution method, we should take one of the equations, and obtain an expression for one of the variables from this equation. Let's take the first one: 3x-2y = 11. We obtain an expression for x (it could be for y as well): 3x = 11 + 2 y ⇒ $x=\frac{11}{3}+\frac{2}{3} \times{y}$ .
Now, we should replace the expression obtain for x in the first equation, on the second equation, as follow

$x-2=4y$ ⇒ $(\frac{11}{3}+\frac{2}{3}\times{y})-2=4\times{y}$
Then rearranging terms $\frac{11}{3}-2=4\times{y}-\frac{2}{3}\times{y}$
This expression results in $y=\frac{1}{2}$
Finally, using the firs equation, in which we obtained an expression from x, $x=\frac{11}{3}-\frac{2}{3} \times{y}$ , we replace y=1/2 and get $x=\frac{11}{3}- \frac{2}{3}\times{\frac{1}{2} }$ , then $x=\frac{10}{3}$

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3 years ago

The cost of oranges in a grocery store is directly proportional to the number of oranges purchased. Jerri payed $2.52 for 6 oran

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Answer: option A is the correct answer.

Step-by-step explanation:

The cost of oranges in a grocery store is directly proportional to the number of oranges purchased. Jerri paid $2.52 for 6 oranges.

If p represents the cost, in dollars,and n represents the number of oranges purchased, then introducing a proportionality constant, k, the equation becomes

p = kn

2.52 = k × 6

k = 2.52/6 = 0.42

Therefore, the equation representing the relationship is

p = 0.42n

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3 years ago

The diagonal of a rectangle is of length a. It splits each corner forming two angles with a ratio of 1:2. The area of the rectan

HACTEHA [7]

Answer:

Step-by-step explanation:

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