Help ASAP please!!!!!

Step-by-step explanation:

Step 1:  Add 13x to both sides

[tex]x^2 + 13x = -13x + 13x - 4[/tex]

[tex]x^2 + 13x = -4[/tex]

Step 2:  Add 4 to both sides

[tex]x^2 + 13x + 4 = -4 + 4[/tex]

[tex]x^2 + 13x + 4[/tex]

Step 3:  Use Quadratic Formula

[tex]x = \frac{ -b \pm \sqrt{ b^2 - 4ac } }{2a}[/tex]

[tex]x = \frac{ -(13) \pm \sqrt{ 13^2 - 4(1)(4)} } { 2(1)}[/tex]

[tex]x = \frac{-13 \pm \sqrt{153}}{2}[/tex]

[tex]x = \frac{-13\pm3\sqrt{17} }{2}[/tex]

Answer:  [tex]x = \frac{-13\pm3\sqrt{17} }{2}[/tex]

Answer:

-0.3 and - 12.7

Step-by-step explanation:

Rewrite in quadratic form:

x2 + 13x + 4 = 0

The best approximations, given the options, are 0 and - 13

The actual solution is -

Answer:

f(0)=1

Step-by-step explanation:

The question asks us to find f(0). We want to find what f(x), or y is, when x is equal to 0.

f(x)=3^x

Therefore, we can substitute 0 in for x.

f(0)=3^0

Evaluate the exponent, 3^0.

Any number raised to the power of zero is equal to 1.

f(0)=1

Answer:

1

Step-by-step explanation:

f(0) = 3^0

f(0) = 1

anything to the 0th power = 1

Answer:B. Mia needs to subtract another 6 square feet.

Step-by-step explanation:

Answer:

yeah the dude above me is right

Step-by-step explanation:

b r u h moment compilation #27

Hey there!

Another word for the mean is the average. To find the mean in a set of numbers, you add up the numbers and then divide by the number of numbers!

39+82+74+96+64+52+74=481

Now, we see that we have seven numbers. So, we divide by seven!

481/7≈68.71 (rounded to nearest hundredth)

I hope that this helps!

Answer:

see below

Step-by-step explanation:

-7 = -7 + 0i

On a plane mark -7 on real axis and go 0 units on imaginary axis

Answer:

f (-4) = 3x(-4)^2 - 7x(-4) - 32 =  44

Step-by-step explanation:

you should replace every x with the number given which is here equals -4

Answer:

197676 diff possible ways

Step-by-step explanation:

Combination because order doesn't matter.

19!/(19-5)!*5!=19!/14!*5!=19*18*17*16*15*14!/14!*5!=19*18*17*17*16*15/5!=23721120/5*4*3*2=23721120/120=197676

Answer:

6/36  

Step-by-step explanation:

Trust me I got it right on Khan academy :)

Answer:

6/36

Step-by-step explanation:

I got it right too on khan academy

Answer:

In order to find the surface area, you will need to add up the areas of each face of the prism. ... In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism. Now, multiply the area of the rectangle by to find the total area of all of the sides of the prism.

Step-by-step explanation:

Answer B

Step-by-step explanation:

2x+1+14

Answer:

B.)

Step-by-step explanation:

B)2x+15

Answer:

Sorry. I cannot really the points and graphs clearly.

I hope I helped you! If my answer is correct, please mark me brainiest. Thanks!

Answer:

Option (4). 25%

Step-by-step explanation:

The graph attached shows the exponential growth.

Let the graphed function is y = [tex](1+\frac{r}{100})^{t}[/tex]

Here 'r' = Rate of growth

t = Duration of time in years

y = enrollments after time 't' years

Graph shows at time 't' = 0 or initially number of enrollments = 20

After 8 years number of enrollments will be

120 = [tex]20(1+\frac{r}{100})^{8}[/tex]

[tex]\frac{120}{20}=(1+\frac{r}{100})^{8}[/tex]

6 = [tex](1+\frac{r}{100})^{8}[/tex]

log 6 = [tex]8\text{log}(1+\frac{r}{100})[/tex]

0.77815 = [tex]8\text{log}(1+\frac{r}{100})[/tex]

[tex]\text{log}(1+\frac{r}{100})[/tex] = 0.0972689

[tex](1+\frac{r}{100})=1.251[/tex]

[tex]\frac{r}{100}=0.251[/tex]

r = 25.1%

r ≈ 25%

Therefore, Option (4) will be the answer.

Answer:

25%

Step-by-step explanation:

did test and it was right

Answer:

j= -0.4

Step-by-step explanation:

multiply both sides by 60

=45j(+12)=30-12

take the 12 ti the right hand side and the sign changes

= -45j=18 then divide by 45 on both sides

j= -2/5

j= -0.4

Answer:

6/95

Step-by-step explanation:

First, let's find the total # of outcomes. There are 8+6+4+2 = 20 marbles in the bag. We have 20 options for the first draw, and 19 for the second. 20*19 = 380 total possible outcomes.

Now, let's fin the successful outcomes. There are 4 red and 6 blue marbles, so 4 for the firs tpick and 6 for the second pick. 4*6 = 24 successful outcomes. To find probability, we do successful outcomes/total outcomes, and in this case, that is 24/380, or 6/95. Hope that helps!

Answer:

Step-by-step explanation:I don't say you have to mark my ans as brainliest but my friend if it has really helped you plz don't forget to thank me...

Answer:

[tex] \frac{9}{14} [/tex]

Step-by-step explanation:

times top numbers and bottom numbers

6 × 3 = 18

7 × 4 = 28

18/28

*simplify*

9/14

Answer:

5

Step-by-step explanation:

the probability of getting a 6 every time you roll the die once is just 1/6. multiply that by 30 and we get our answer, which is 5 times.

Answer:

The answer would be A. $7.00!

Step-by-step explanation:

To find range subtract the lowest amount from the highest, the difference will be your answer.

Answer:

[tex]y=-\frac{6x}{5}[/tex]

Step-by-step explanation:

[tex]-2x + 7y = -5\\-2.0 - 4y = 6[/tex]

[tex]y=-\frac{6x}{5}[/tex]

Answer:

50 x^3 y^2

Step-by-step explanation:

25y^5 = 5*5 * y*y

5xy  = 5*x*y

2x^3y = 2*x*x*x*y

The least common multiply is  found by taking the least number of times each appears

5 appears 2 times

2 appears 1 time  

x appears 3 times

y appears 2 times

5*5*2  * x*x*x * y*y

50 x^3 y^2

Answer:

50 x^3 y^2

Step-by-step explanation:

25y^5 = 5*5 * y*y

5xy  = 5*x*y

2x^3y = 2*x*x*x*y

The least common multiply is  found by taking the least number of times each appears

5 appears 2 times

2 appears 1 time  

x appears 3 times

y appears 2 times

5*5*2  * x*x*x * y*y

50 x^3 y^2

Answer:

Coca cola bottles = 6

Milk bottles = 14

Jellybeans = 10

Step-by-step explanation:

We are given that a bag of sweets contains coca cola bottles, milk bottles and jellybeans.

The ratio of these sweet bottles is given as,

3:7:5

It is known that there are 6 coca cola bottles.

We are asked to find the quantity of milk bottles and jellybeans.

Coca cola bottles:

Since the ration is 3:7:5

3 parts of coca cola bottle = 6

1 part of coca cola bottle = 6/3 = 2

Milk bottles:

So 7 parts of milk bottle = 7*2 = 14

Jellybeans:

So 5 parts of milk bottle = 5*2 = 10

Therefore,

Coca cola bottles = 6

Milk bottles = 14

Jellybeans = 10

Verification:

6:14:10

Simply the ratio by dividing it with 2

3:7:5

Which reduces to the given ratio hence results are correct.

Answer:

d= -16

Step-by-step explanation:

-16 +4=-12

Answer:

d=−16  

Step-by-step explanation:

d+4−4=−12−4

d=−16

Answer:

The equation of the axis of symmetry for this parabola is x = 0.

Step-by-step explanation:

For parabola's, it's axis of symmetry always goes through the vertex of the parabola. In other words, the axis of symmetry is vertical line that goes through the x-coordinate of the vertex.

Now, the vertex is given as (0,3) which is at x = 0, y = 3.

Thus, the vertical line that goes through the x-coordinate of the vertex will be x = 0

Thus, the equation of the axis of symmetry for this parabola is x = 0.

Answer:

[tex](-2,\, 4)[/tex].

Step-by-step explanation:

To find the vertex of this parabola, start by rewriting it in the vertex form [tex]f(x) = a\, (x - h)^2 + k[/tex].

Start with the original expression:

[tex]f(x) = (x + 2)^2 + 4[/tex].

Note that in the vertex form, the sign in front of [tex]h[/tex] should be a minus. However, in [tex]f(x) = (x + 2)^2 + 4[/tex], the sign in front of [tex]2[/tex] is a plus. Since adding

[tex]f(x) = (x - (-2))^2 + 4[/tex].

Therefore:

Hence, [tex](-2,\, 4)[/tex] is the vertex of this parabola.

Answer:

The height of the triangle is 8 cm

Step-by-step explanation:

First we need to write down the question in a mathematical format and then solve.

let b be the base of the triangle and h be the height of the triangle

"The base of a right triangle is 13 less than 2 times the height" can be written as

b = 2h - 13 -----------------------------------------------------(1)

"The area of the triangle is 12 square cm" can be written as;

area of the triangle = 12 cm²

but area of a triangle = [tex]\frac{1}{2}[/tex] ×b × h

This implies that

[tex]\frac{1}{2}[/tex] ×b × h = 12 cm²

bh = 24 cm² --------------------------------------------------(2)

substitute equation (1) in equation (2)

(2h - 13)h = 24

2h² - 13h = 24

2h² - 13h - 24 = 0 ----------------------------------------------(3)

The above is now a quadratic equation, so we will solve by completing the square method.

Find two numbers such that its product will give -48 and its sum will give -13

The two numbers are -16 and 3

Replace -13h by  (-16h +  3h) in equation (3)

2h² - 13h - 24 = 0

2h² - 16h + 3h - 24 = 0

2h(h - 8) + 3(h-8) = 0

(h-8)(2h+3) = 0

either h-8 = 0

           h = 8

OR

2h + 3 = 0

2h = -3

h =-3/8

There is no such thing as negative length, therefore h= 8 is the answer

The height of the triangle is 8 cm

Answer:

distributive property

Answer:

associative property

Step-by-step explanation:

The associative property states that you can reorder or regroup numbers and still get the same answer.  In this example, we are regrouping the numbers (parenthesis around different numbers)

Answer:

14 cubic inches

Step-by-step explanation:

First, we have to find the radius from the circumference. We know that the circumference can be found using the equation c = 2pi(r). Set c equal to 7.1, and solve for r by dividing by 2pi.

Now, we have a radius of 1.13. Using this, we can plug the radius and the height into the equation used to find the volume of a cone: v = pi(r^2)(h/3)

This leads us to 14.04, or 14, when rounded to the nearest tenth of a cubic inch.

Answer:

3 or 7

Step-by-step explanation:

[tex]-2x^2+20x-42=0\\-2(x^2-10x+21)=0\\-2(x-7)(x-3)=0\\x=7, 3[/tex]

Hope this helps!

Answer: google will help

Step-by-step explanation:

Answer:

10 x 10n^2 -1

Step-by-step explanation:

any expression as long as they equal the same as your equation (100n^2-1)

Answer:

(10n + 1)(10n - 1)

Step-by-step explanation:

Answer:

Correct option: D

Step-by-step explanation:

First we need to find the rate of the series, and we can do that subtracting one term by the term before:

Second term minus first: 13/10 - 1/2 = 13/10 - 5/10 = 8/10 = 4/5

Third term minus second: 21/10 - 13/10 = 8/10 = 4/5

So the series increases by 4/5 for every term, and the first term is 1/2

We also need to find the number of terms of this series.

The last term is 93/10, so we have that:

1/2 + (4/5)*k = 93/10

(4/5)k = 88/10

k = 11

The index of the summatory should go from 0 to 11.

So the correct option is D