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3 years ago

Which of the following is an arithmetic sequence?

1 answer:

7 0

0, 2, 4, 6 is because the rule it to add 2

1, 2,4,8 is a geometric sequence since the rule is to mutliply by 2
1,4,8, 13 is neither even though there is a pattern add 3, add 4 add 5 etc.

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Subtract and simplify: 3x(5x + 2) – 2(x2 + x – 1)

Lostsunrise [7]

Answer:

Simplify the expression.

−2x2+13x+8

Step-by-step explanation:

Decimal Form:

7.06608438

…

−

0.56608438

…

5 0

3 years ago

Answer right get brainiest !!!! 12 points

Anvisha [2.4K]

80*t+70*t=50
t = .33 hours =20 minutes
This assumes the trains are going opposite directions (opposite tracks so I’m assuming opposite directions)

4 0

3 years ago

In the table below, x represents the miles traveled and y represents the cost to travel by train.

Afina-wow [57]

Answer:

Third option

m = 2.25

Step-by-step explanation:

The slope of the function is equal to its rate of change between two points.

For example, for a couple of points $(x_1, y_1),\ (x_2, y_2)$

The slope is:

$m =\frac{y_2-y_1}{x_2-x_1}$

In this problem we have the following points

1.(2, 8.50) , 2. (5, 15.25), 3. (8, 22.00) , 4. (12, 31.00)

We calculate the slope between the first two points

$m =\frac{15.25-8.50}{5-2}=2.25$

We calculate the slope between the points 3 and 4

$m =\frac{31-22}{8-4}=2.25$

We calculate the slope between the points 2 and 3

$m =\frac{22-15.25}{8-5}=2.25$

The slope is always the same. Therefore m is constant and the fution is a line of slope m = 2.25

7 0

3 years ago

Read 2 more answers

840 students attend Northfield middle school. 65%of students earned a perfect attendance award. How many students didn't earn th

DochEvi [55]

Answer:

546

Step-by-step explanation:

840 x 0.65 = answer .. in this case 546

6 0

3 years ago

F(x)=8x^2-2x+3<br> g(x)=12x^2+4x-3<br> what is h(x)=f(x)-g(x)?

Trava [24]

Answer: $h(x)=-4x^2-6x+6$

Step-by-step explanation:

To find the function h(x), you need to subtract the function $f(x)=8x^2-2x+3$ and the function $g(x)=12x^2+4x-3$ .

$h(x)=f(x)-g(x)\\h(x)=8x^2-2x+3-(12x^2+4x-3)$

Distribute the negative sign:

$h(x)=8x^2-2x+3-12x^2-4x+3$

Now you can add the like terms:

$h(x)=-4x^2-6x+6$

Therefore, you get that the function h(x) is:

$h(x)=-4x^2-6x+6$

6 0

3 years ago

Read 2 more answers