Find 22÷(−2) need help

Answer:

The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol. See: Variable.

Step-by-step explanation:

Step-by-step explanation:

[tex] \sqrt{ \frac{9}{16} } \: is \: an \: irrational \\ hopeit \: helps \\ plz \: mark \: as \: brainliest.....[/tex]

Answer:

GT, GV, PT, PV, ET, and EV.

Step-by-step explanation:

Given that

The number of topics Travis has to chose from are 3 topics(G, P, E).

The number of ways Travis can study each topic are 2 ways(T, V).

Essentially, the number of combinations Travis is expected to be able to chose from is given as

The number of combinations = The number of topics * The number of ways

The number of combinations = 3 * 2

The number of combinations = 6

Therefore, the total possible combinations has to be

GT, GV, PT, PV, ET, and EV

Answer:

If i'm correct it would be -49 and -8

Step-by-step explanation:

Answer:

3. $3

4. $17

Step-by-step explanation:

15% of 20 is 3 so it'd be a discount of $3. 20-3=17

Answer:

0

Step-by-step explanation:

a1 is the first term and d is the number it goes up each time so you can just do 14 times 1/2 and add it to -7 so you get 0 for the 15th term

Answer:

hope these help........

Answer:

[tex]x = \frac{-3}{4}[/tex] or  [tex]x = \frac{3}{2}[/tex]

Step-by-step explanation:

[tex]8x^{2} - 4x = 2x +9[/tex]

Okay, let's put everything on one side.

[tex]8x^{2} -4x-2x-9=0[/tex]

As you can see we can subtract -4x from -2x now leaving us with -6x.

[tex]8x^{2} -6x-9=0[/tex]

Now there are multiple ways to solve a polynomial, but we can go with a way to factor them the easy way. We need to multiply the leading coefficient with the ending term because there is no common number we can factor out of these guys.

[tex]8(-9)=-72[/tex]

We multiplied 8 and -9 together which gave us -72. With this, we need to find two numbers that add to the middle term, -6, but will multiply to -72. This is going to be 6 and -12. Now we are going to replace the middle coefficient with those two numbers.

[tex]8x^{2} + 6x - 12x- 9= 0[/tex]

(Keep in mind the equation has not changed)

Now we are going to do something called factoring by grouping, with the first two terms, 8x^2 and 6x we take out the GCF (greatest common factor):

[tex]2x(4x+3)[/tex]

so let's do the same between the last two.

[tex]-3(4x+3)[/tex]

So when putting them together we have,

[tex]2x(4x+3)-3(4x+3)=0[/tex]

Now let's factor here, (4x+3) can be taken out and 2x as well as -3 can be put together.

[tex](4x+3) (2x-3)=0[/tex]

Then we set these factors to zero to get our x answer:

[tex]4x+3=0[/tex]

[tex]2x-3=0[/tex]

And we solve, which leaves us with:

[tex]x = \frac{-3}{4}[/tex] or  [tex]x = \frac{3}{2}[/tex]

Answer:

C.$0.15 I TOOK IT ON STUDY ISLAND

Step-by-step explanation:

First, you want to find an exact point on the graph.  What I mean by this is you want to go somewhere on the graph where the line goes through an exact y and x value.

Second, you want to figure out where this x and y value are.  Where the graph first goes through two points is at (20, 3).

Third, you want to figure out what the 20 and the 3 mean.  20 is the number of messages and 3 is the dollar amount.

Finally, to calculate the amount of money per message, you divide the dollar amount (3) by the number of messages (20).  So, you have 3/20.  After this, simplify 3/20 to get 0.15, or 15 cents per message.

Answer:

b =  18.56

c =  12.75

A = 40°

Step-by-step explanation:

Law of sines: a/sinA = b/sinB= c/sinC

12 / sin (180°-97°-43°) = b/sin97° = c/sin43°

12/sin40° = 12/0.64 = 18.75

b = 18.75 x sin97° = 18.75 x 0.99 = 18.56

c = 18.75 x sin 43° = 18.75 x 0.68 = 12.75

check: 12/sin40° = 12/0.64 = 18.75

b: 18.56 sin97°=0.99      18.56/0.99 = 18.747 ≈ 18.75

c: 12.75   sin43° = 0.68   12.75/0.68 = 18.75

Here is the answer! Hope it helps! (C.)

Answer:

The answer is 639.

Step-by-step explanation:

42.6 × 15

639

Answer: 639

Step-by-step explanation:

42.6 x 15 =639

Answer:

60(.3)= 18

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

Answer:

Step-by-step explanation:

-7

answer: the one that says 16+6m

Answer:

667.30

Step-by-step explanation:

Well we can right this equation as 800(.985)^x  it's an exponential function then we substitute x for 12 and get 667.30

Answer:

.65

.9

1.4

.5

.25

.75

1.25

1.5

Step-by-step explanation:

You can double check by putting them into your calculator or dividing them by hand

Answer:

0.65

0.9

1.4

0.5

0.25

0.75

1.25

1.5

Step-by-step explanation:

Answer:

Line B

Step-by-step explanation:

The line B has a proportionality of one which you can tell because of the equation Y=1X. Simplified, this equation means that for every increase in X value, there is an equal increase in Y value. This equation can be used to find the proportionality rate of other lines such as how A is Y=2X and C is Y=1/2X.

Answer:

B

Step-by-step explanation:

Answer: is 7 an answer choice ?

Step-by-step explanation:

Answer:

x=7

Step-by-step explanation:

x-15/5=4

x-3=4

x=4+3

x=7

[tex]\Large\boxed{\tt Answer:~Isosceles~Triangle;~x=25}[/tex]

[tex]\tt Step-by-step~explanation:[/tex]

Since this triangle has two congruent angles/sides, we know that it is an isosceles. We can tell by looking at the markings on the triangles: The curves on both angles A and C indicate that they are congruent, and the markings on lines AB and CB also tell us that they are congruent.

To solve for x, we set up our equation like this:

[tex]\tt 4x-20=2x+30[/tex]

Since we know that lines AB and CB are congruent, that means 4x - 20 is equal to 2x + 30.

To solve, we can first subtract 2x from both sides and add 20 to both sides.

[tex]\tt 4x-(2x) -20=2x-(2x)+30\\2x-20+(20)=30+(20)\\2x=50[/tex]

Then, we divide both sides by 2 to isolate x.

[tex]\tt \frac{2x}{2} \frac{50}{2} \\x=25[/tex]

We can check if our answer is correct by plugging in our value for x into both expressions and see if they equal the same thing.

[tex]\tt 4(25)-20=80\\2(25)+30=80\\Correct[/tex]

Answer:

40 feet represents the height of the tree ⇒ H

Step-by-step explanation:

Let us solve the question using the proportional

∵ A tree casts a shadow 64 feet long

∴ L[tex]_{T}[/tex] = 64 feet

∵ At the same time, a girl 5 feet tall standing near the tree

∴ H[tex]_{G}[/tex] = 5 feet

∵ She casts a shadow that is 8 feet long

∴ L[tex]_{G}[/tex] = 8 feet

The ratios between the shadows and the heights of the tree and the girl are proportional

∵ [tex]\frac{H_{T}}{H_{G}}[/tex] = [tex]\frac{L_{T}}{L_{G}}[/tex]

→ Substitute their values in the equivalent ratios

∴ [tex]\frac{H_{T}}{5}[/tex] = [tex]\frac{64}{8}[/tex]  

→ By using cross multiplication

∴ H[tex]_{T}[/tex] × 8 = 5 × 64

∴ 8H[tex]_{T}[/tex] = 320

→ Divide both sides by 8

∴ H[tex]_{T}[/tex] = 40 feet

∴ 40 feet represents the height of the tree

Answer: f(x) = 2

Step-by-step explanation:

I think this is the answer I hope it helps u

Answer:    2h- 8

Step-by-step explanation:

Answer:

2h-8

Step-by-step explanation:

Simplify

Distribute

2 ( ℎ − 4 )

2 ℎ − 8

Solution

2 ℎ − 8

Answer:

Step-by-step explanation:

-5 BECAUSE -4.5 IS CLOSER TO 0

Answer:

0 and 8/3

Step-by-step explanation:

y is continuous on [0,4]

It also also differentiable on (0,4)

Plugging in 0 and 4, we get -3 both times so y(0) = y(4).

Therefore there is at least one value c between 0 and 4 inclusive where y'(c) = 0

y' = -3x^2 + 8x

Set that to 0:

-3x^2 + 8x = 0

x(-3x+8) = 0

x = 0 or 8/3

And both values work.

Answer: area= 29

               Perimeter= 4

Step-by-step explanation:

Answer:

yes

Step-by-step explanation:

To determine if the sides form a right triangle.

If the square of the longest side is equal to the sum of the squares on the other 2 sides then triangle is right.

longest side is c = 13

13² = 169

a² + b² = 12² + 5² = 144 + 25 = 169

Since c² = a² + b² = 169

Then the sides form a right triangle