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2 years ago

This is a sat practice. need help

Mathematics

2 answers:

Mila [183]2 years ago

5 0

So you would have

(7+3i)+(-8+9i)

You go ahead and rewrite it like this

7-8+3i+9i

And then combine like terms

-1+12i

So your answer is A

nadya68 [22]2 years ago

4 0

Answer:

The answer is A) -1 + 12i

Step-by-step explanation:

(7 + 3i) + (-8 + 9i)

(7 - 8) + (3 + 9)i

7 - 8 = - 1

3 + 9 = 12

- 1 + 12

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You are choosing between two health clubs. Club A offers membership for a fee of $ 28$28 plus a monthly fee of $ 20.$20. Club B

eimsori [14]

Answer:

That is to say that at 3 months, the values of the club are equal.

Club A = 268 dollars in total

Club B = 295 dollars in total

Step-by-step explanation:

The first thing is to propose an equation for each club. Let m be the number of months.

Club A = 28 + 20 * m

Club B = 19 + 23 * m

Now, to know when it is the same, we must equal the value of Club A with Club B, it would look like this

28 + 20 * m = 19 + 23 * m

By rearranging the equation we have:

23 * m - 20 * m = 28-19

3 * m = 9

m = 3

That is to say that at 3 months, the values of the club are equal.

Now to know the total value, we will do it with an annual membership, which would be a total of 12 months, therefore it is to replace in the equation of each one:

Club A = 28 + 20 * 12 = 268 dollars in total

Club B = 19 + 23 * 12 = 295 dollars in total

3 0

3 years ago

The cost of performance tickets and beverages for a family of four can be modeled using the equation 4x + 12 = 48, where xrepres

kumpel [21]

Solve the equation for x:
4x+12=48
Subtract 12 from both sides: 4x=36
Divide 4 from both sides to isolate x: x=9

8 0

2 years ago

Read 2 more answers

The table represents some points on the graph of a linear function.

Sunny_sXe [5.5K]

Answer:

B. $-\frac{9}{2}$

Step-by-step explanation:

Rate of change of y with respect to x, can be calculated using any two of the pairs of values of the table, say, (-2, 12) and (0, 3).

Rate of change = $\frac{y_2 - y_1}{x_2 - x_1}$

Let,

$(-2, 12) = (x_1, y_1)$

$(0, 3) = (x_2, y_2)$

Plug in the values

Rate of change = $\frac{3 - 12}{0 - (-2)} = \frac{-9}{2} = -\frac{9}{2}$

7 0

2 years ago

In a week 24 hens laid 96 eggs. What is the unit rate for eggs per hen?

Ugo [173]

There are 4 eggs per hen
What you have to do is
24 hens/ 96 eggs

5 0

3 years ago

How to find A? help please and thanks

MrRa [10]

This problem exercises the concept of "similar triangles."

With similar triangles, we can compare the sides using ratios.
The equation we can use to find side A is stated below.

Side 1A / Side 1B = Side 2A / Side 2B

The number refers to the triangle, and the letter refers to the side of each triangle. Side A in both triangles must be the base of the triangle, and side B in both triangles can be either of the other sides. The only restriction is that once we pick a side B on triangle 1, we must pick that same side on triangle 2.

A / 7 = 3 / 2

Then we can solve for the length of side A.

A = 7*3/2 = 21/2 = (E) None of These

8 0

3 years ago

This is a sat practice. need help ​

This is a sat practice. need help