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3 years ago

Can someone explain to me

Mathematics

1 answer:

Veseljchak [2.6K]3 years ago

3 0

Answer:

The correct angles would be AFE and CFD

Step-by-step explanation:

Vertical angles are 2 intersecting lines that make equivalent angles (usually 180 degrees of each other). Basically a vertical angle is the opposite of another angle, having the same degrees as it's opposite, or vertical, in this case.

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one high speed internet provider has a $50 setup fee and costs $30 per month. another has no setup fee and costs $40 per month.

vlabodo [156]

Answer:

y=30x+50 and y=40

Step-by-step explanation:

7 0

3 years ago

Find the sum of the first 12 terms of the sequence. Show all work for full credit. 1, -4, -9, -14, . . . (2 points)

My name is Ann [436]

Answer:

$S_n=$ -348

Step-by-step explanation:

We are given the following arithmetic sequence and we are to find the sum of its first 12 terms:

1, -4, -9, -14, . . .

For that, we will use the formula for the sum of the arithmetic mean:

$S_n=\frac{n}{2} (a_1+a_n)$

We know the value of the first term ( $a_n$ ) but we need to find the value of $a_{12}$ . So we will use the following formula:

$a_{12}=a_1+(n-1)d$

$a_{12}=(-4)+(12-1)(5)$

$a_{12}=-59$

Substituting these values in the sum formula to get:

$S_n=\frac{12}{2} (1+(-59))$

$S_n=$ -348

4 0

3 years ago

Read 2 more answers

Equation for y and what if equals too

katen-ka-za [31]

The answer is y = 35x + 20.

In order to find this, start with two ordered pairs. For the purpose of this problem, we'll use (1, 55) and (2, 90). Now we use the slope formula to find the value next to x in the equation.

m(slope) = (y2 - y1)/(x2-x1)

In this equation (x1, y1) is the first ordered pair and (x2, y2) is the second. Plug in to the equation and solve.

m = (90 - 55)/(2 - 1)

m = 35/1

m = 35

Now that we have the slope, plug that into the equation along with either point to find the intercept (the last number).

y = mx + b

55 = 35(1) + b

55 = 35 + b

20 = b

Now that we have the slope and intercept, we can use each to fill in those blanks.

y = 35x + 20