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3 years ago

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:

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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Grandma Gertrude gave 13 pieces of jewelry and grandma Fien gave y pieces of jewelry to the Carlson sisters to divide evenly amo

Papessa [141]

Answer:

$x=\frac{13+y}{5}$

Step-by-step explanation:

Grandma Gertrude gives 13 and Fien gives y.

$x=13+y$

The total amount of jewelry divided evenly between the 5 sisters:

$x=\frac{13+y}{5}$

Nothing further can be done without knowing another value.

4 0

2 years ago

The price of a wallet is $31.95 and the sales tax is 7.5%.

Musya8 [376]

Answer:

34.35

Step-by-step explanation:

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3 years ago

Is y=3x+4 a function?

Oxana [17]

Answer:

Yes, it is a function

Step-by-step explanation:

Every possible input x value is paired with a unique output y value.

Another approach is to graph the function then conduct the VLT (vertical line test) at which point you will realize that any vertical line will intersect the graph at one point only meaning it is a function.

Hope this helps.

5 0

1 year ago

(3 and 5/8+ 1/2)×(6 and 3/4- 7/8)

Leviafan [203]

2.375*3.65=8.667
that is the answer

3 0

3 years ago

I really need helppppp

Dmitry [639]

Answer: the distance of the boat from the foot of the lighthouse is 290.5 feet.

Step-by-step explanation:

The right angle triangle ABC representing the scenario is shown in the attached photo.

Angle A is alternate to the angle of depression, hence, they are the same.

The height of the lighthouse represents the opposite side of the right angle triangle. The distance, x of the boat from the foot of the lighthouse represents the adjacent side of the right angle triangle.

To determine x, we would apply

the tangent trigonometric ratio.

Tan θ, = opposite side/adjacent side. Therefore,

Tan 11.1 = 57/x

x = 57/Tan 11.1 = 57/0.1962

x = 290.5 feet to the nearest tenth.

6 0

2 years ago