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Vaselesa [24]
3 years ago
15

PLEEEASE HELLLLP!!!!!!! If x+7=2y and y=2x−1, what is the value of y?

Mathematics
1 answer:
viktelen [127]3 years ago
6 0

Answer:

13

Step-by-step explanation:

We can add 1 to both sides of the second equation and divide by 2 to get

x = (y-1)/2

We can then substitute x in the first equation to get

(y-1)/2 + 7 = 2y

Multiply by 2

y-1 + 14 = 2y

Subtract y and combine like terms

y = 13

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2x2 + 2x-4?
nexus9112 [7]
Answer:

2x^2 +2x-4
——————
2x^2-4x+2

Factor out 2 from the expression

2(x^2+x-2)
—————-
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Write x as a difference

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Use a^2-2ab+b^2=(ab)^2

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Factor out negative sign from the expression

X*(x+2)-(x-2)
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(x+2)(x-1)
—————-
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——
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6 0
3 years ago
(PLS HELP AND FAST!!!!) 1. A single, standerd number cube is tossed. What is the probality of getting a number GREATER then 3? A
11111nata11111 [884]

Answer:

D

Step-by-step explanation:

assuming a 6 sided die half of the die is above 3 so 1/2

5 0
2 years ago
Please I will rate you with 5 stars just please help me with this problem
olchik [2.2K]

Answer:

D

Step-by-step explanation:

If we isolate the variable in each given compound inequality, we can quickly realize that D is correct.

16\geq 3x+4>1\\12\geq 3x>-3\\4\geq x>-1

x is less than or equal to four (solid point on 4 with line going left), but greater than -1 (open point going right).

Signs with 'or equal to' have solid points, and signs without are not solid.

I hope this helps!

8 0
3 years ago
1,000 times 10 of the power of 3
NNADVOKAT [17]

Answer:

1,000,000

Step-by-step explanation:

10 to the power of 3 is 1,000.

1,000 x 1,000 = 1,000,000

6 0
1 year ago
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