f(x)= 3x² +x-2, then f(-2)

Answer:

9.7

Step-by-step explanation:

Answer:

[tex]\boxed {\boxed {\sf x \approx 9.7}}[/tex]

Step-by-step explanation:

This is a right triangle, which we know because of the square in the corner of the triangle. We can use the right triangle trigonometric ratios.

[tex]sin( \theta) =opposite/hypotenuse[/tex]  and [tex]cos (\theta) = adjacent /hypotenuse[/tex] and [tex]tan (\theta)=opposite/adjacent[/tex]

First, identify each side of the triangle as adjacent, opposite, or hypotenuse, relative to the 68 degree angle.

The x is next to, or adjacent, to the angle. The 24 is opposite. We are not given the hypotenuse.

[tex]adjacent= x \\opposite= 24 \\hypotenuse= unknown[/tex]

Since we have the adjacent and opposite, we must use tangent.

[tex]tan (\theta)=\frac{opposite}{adjacent}[/tex]

Substitute the values in. The theta (θ) is the angle.

[tex]tan (68)=\frac{24} {x}[/tex]

Solve for x. One way is by cross multiplying.

[tex]\frac{tan(68)}{1}=\frac{24}{x}[/tex]

Multiply the 1st numerator by the 2nd denominator. Then, multiply the 1st denominator by the 2nd numerator.

[tex]tan (68)*x=1*24[/tex]

[tex]tan(68)*x=24[/tex]

Evaluate tan(68) using a calculator.

[tex]2.47508685*x=24[/tex]

Divide both sides of the equation by 2.47508685. This will isolate the variable x. ( We divide because multiplication is occurring between 2.47508685 and x, and division is the inverse of multiplication).

[tex]\frac{2.47508685*x}{2.47508685}=\frac{24}{2.47508685}[/tex]

[tex]x=\frac{24}{2.47508685}[/tex]

[tex]x=9.69662943[/tex]

Round to the nearest tenth. The 9 in the hundredth place tells us to round up. The 6 becomes a 7.

[tex]x \approx 9.7[/tex]

In this right triangle, x is equal to about 9.7

Answer:

6.8

Step-by-step explanation:

In order to do this equation you must find out what -6/5u+8 is which has to equal greater than -10.

-6/5 as a decimal is -1.2

-1.2+8= 6.8

So it is 6.8>-10

Answer:

$28

Step-by-step explanation:

John and his best friend each got $14, so in total there are $14+$14=$28.

Answer:

$28

Step-by-step explanation:

If they split the money evenly then both of them got half.

So, multiply 14 by 2 to find the answer:

(14)(2) = 28

John and his best friend found a total of $28.

I hope this helps!!

- Kay :)

Answer:

69

Step-by-step explanation:

hope this helps :)

Answer:

69!

Step-by-step explanation:

Hope i helpedhave a nice day

Answer:

Na20+H20 -> 2NaOH

Step-by-step explanation:

Answer:

x>-15/4

Step-by-step explanation:

1/3(6/8+1/2x)>-3/8

3/4 + 1/2 x>- 9/8

6+4x>-9

4x>-9-6

4x>-15

x>-15/4

Answer:

the second choice 25x+75.50<525

75.50 + 25x < 525

The car can be rented for 17 days.

On the line you will have a lone pointing to the left with an open circle on 17.

75.50 + 25x < 525

25x < 525 - 75.50

25x < 449.50

x < 449.50/25

x < 17.98

Answer:

16

Step-by-step explanation:

Answer:

Step-by-step explanation:

Did u find it

Answer:

14

Step-by-step explanation:

35/2.5

Answer:

Figure 1: A , D

Figure 2: B, E

Figure 3: C, F

Hope that helps!

Step-by-step explanation:

ab+a+b+b+ab

=2ab+a+2b

=a+2b+2ab

We can only add the same term numbers together.

hope it helps!

Answer:

for every 2 seniors there are 3 juniors or 2:3

The ratio of seniors to total students will be 2: 5.

A ratio is a group of sequentially ordered numbers a and b expressed as a/b, where b is never equal to zero. When two objects are equal, a statement is said to be proportional.

There are 10 seniors and 15 juniors in a gym class.

The total number of students will be given as,

Total students = 10 + 15

Total students = 25

Then the ratio of seniors to total students will be given as,

Ratio = Seniors / Total student

Ratio = 10 / 25

Ratio = 2 / 5

The ratio of seniors to total students will be 2: 5.

More about the ratio and the proportion link is given below.

https://brainly.com/question/14335762

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Answer:

Step-by-step explanation:

250 is 125% of 200

So,

He gained 25% in profit

Based on the information given his gain as a percentage of the  cost price is 25%.

Using this formula

Cost price percentage=Selling price-Cost price/Cost price

Where:

Selling price=$250

Cost price=$200

Let plug in the formula

Cost price percentage=$250-$200/$200

Cost price percentage=$50/200

Cost price percentage=0.25×100

Cost price percentage=25%

Inconclusion his gain as a percentage of the  cost price is 25%.

Learn more here:https://brainly.com/question/18522227

Answer:

a = 100 + 45t

Step-by-step explanation:

$100 is a one time addition so it will be a constant

100

$15 is added three times a month, so $45 a month

t stands for months as shown in the question

100 + 15(3)t

100 + 45t

Answer:

yes, or find the lowest common multiple (LCM) of the two denominators

Step-by-step explanation:

Answer:

Graph 1: perfect negative correlation

Graph 2: modest negative correlation

Graph 3: modest positive correlation

Graph 4: strong positive correlation

Graph 5. weak negative correlation

Step-by-step explanation:

If i'm wrong PLEASE correct me

The graph first is perfect negative correlation, graph second is the modest negative correlation.

It is defined as the relation between two variables which is a quantitative type and gives an idea about the direction of these two variables.

[tex]\rm r = \dfrac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{{[n\sum x^2- (\sum x)^2]}}\sqrt{[n\sum y^2- (\sum y)^2]}}[/tex]

As we know, the coefficient of correlation varies between -1 and +1.

If r = +1 (means the relation between the variable is strong and positive)

If r = -1 (means the relation between the variable is strong but negative)

As we can see in the graph, the line goes down represents the negative correlation and the line goes up represents the positive correlation.

So, we can say:

The first graph is perfect negative correlation.

The second graph is modest negative correlation.

The third graph is modest positive correlation.

The fourth graph is strong positive correlation.

The fifth graph is weak negative correlation.

Thus, the graph first is perfect negative correlation, graph second is the modest negative correlation.

Learn more about the correlation here:

brainly.com/question/11705632

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Answer:

What are the answers again??

Step-by-step explanation:

Answer:

ummmm

Step-by-step explanation:

u already answer ur own question tho?

Answer: I don't see anything. Maybe upload some images?

Step-by-step explanation:

Answer:

The slope is, -4.000/-2.000 which = 2.000

Step-by-step explanation:

Brain-List?

Answer:

AD if my calculations are correct

Step-by-step explanation:

Answer:

I think the answer would be CD

Step-by-step explanation:

If I remember correctly, the angles correspond with the line they are opposite of

Answer:

Ya I think your right

Step-by-step explanation:

Answer:

8 + 2w

Step-by-step explanation:

⇒ Change all signs to addition (subtraction is the same as adding a negative):

5 + 3w + 3 + -w

⇒ Since the expression is now all addition, you can rearrange them in any order. So group the terms together by their type:

5 + 3 + 3w + -w

⇒ Simplify:

8 + 2w

Answer: 8 + 2w

Hope this helps! :)

Answer:

[tex]x\leq 5[/tex]

Step-by-step explanation:

45+18x=145

18x=100

x<=5

So x is equal to or less than 5

Hope this helps plz hit the crown :D

Answer:

81 miles

Step-by-step explanation:

378/14=27

The unit rate is 27 miles per hour

27*3 = 81

Answer: x=13/2

Step-by-step explanation: hope this helps!