Find the solutions of the quadratic equation -9c² +2 +3 = 0.

Answer:

The cube of [tex](x+2)^3 \:is\:\mathbf{(x+2)(x^2-2x+4)}[/tex]

Step-by-step explanation:

We need to find cube of [tex](x+2)^3[/tex]

It can be found using formula: [tex](a+b)^3=(a+b)(a^2-ab+b^2)[/tex]

In the question given:

We have a = x and b = 2

Now finding cube using the above formula:

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

So, the cube of [tex](x+2)^3 \:is\:\mathbf{(x+2)(x^2-2x+4)}[/tex]

This is an right angle ∆ and the side lengths containing a right angle are 9 and 11.

By Pythagoras theoram,

[tex] {p}^{2} + {b}^{2} = {h}^{2} [/tex]

where p is the perpendicular, b is the base and h is the hypotenuse.

Plugging the values,

[tex] {9}^{2} + {11}^{2} = {h}^{2} [/tex]

Then,

[tex]h = \sqrt{ {9}^{2} + {11}^{2} } [/tex]

[tex]h = 14.12(approx.)[/tex]

The x of the right angled ∆ = 14.12

Answer:

the top angle is 11 and the angle on the left is 9 so the X will be rounded to the nearest hundreth since it's the biggest angle so 11×9=109 so yea I THINK its 100 since it's rounding

Answer:

m = -2 and n = 10

Step-by-step explanation:

If the polynomial mx^3 - 3x^2 + nx + 2 is divided by x + 3, the remainder is -1. Then;

x+ 3 = 0

x = -3

Substitute x =-3 into the polynomial and equate to -1

-1 = m(-3)³-3(-3)²+n(-3) + 2

-1 = -27m - 27 - 3n + 2

27m + 3n = -25 + 1

27m + 3n = -24 ... 1

Similarly, if it is divided by x - 2, the remainder is -4, then;

-4 =  m(2)³-3(2)²+n(2) + 2

-4 = 8m - 12- 2n + 2

8m -2n = -4 + 10

8m + 2n = 6 ... 2

Solve 1 and 2 simultaneously

27m + 3n = -24 ... 1 * 2

8m + 2n = 6 ... 2 * 3

______________________

54m + 6n = -48

24m + 6n = 12

54m - 24m = -48 - 12

30m = -60

m = -60/30

m = -2

Get n by substituting m = -2 into 1

From 1:  27m + 3n = -24

27(-2) + 3n = -24

-54 + 3n = -24

3n = -24 +54

3n = 30

n = 30/3

n = 10

Hence m = -2 and n = 10

Answer:

Step-by-step explanation:

The principal amount is

P=3000.

The time for which money is borrowed is ,

[tex]t=9 months[/tex]

The interest rate is ,

[tex]R=3\frac{1}{2}[/tex]

Determine the time in terms of year by division of time by 12.

[tex]t=\frac{9}{12} years\\= \frac{3}{4} years\\[/tex]

The formula for the interest is ,

[tex]I=\frac{P.r.t}{100}[/tex]

Substitute the known calues in the formula to obtain the value of interest.

[tex]I=\frac{3000.\frac{3}{4} .3\frac{1}{2} }{100} \\=\frac{3000.3.7}{2.4.100} \\=78.75\\[/tex]

So interest paid by the woman is $78.75

(b)

Determine the amount paid by the woman .

[tex]A=P+I\\=3000+78.75\\=3078.75[/tex]

So woman repay $3078.75 to the bank.

PLEASE MARK ME AS BRAINLIEST

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete as the radius of the sphere is missing.

The volume of a sphere is:

[tex]V = \frac{4}{3}\pi r^3[/tex]

Substitute 3.14 for [tex]\pi[/tex]

[tex]V = \frac{4}{3}* 3.14* r^3[/tex]

[tex]V = \frac{4* 3.14}{3}* r^3[/tex]

[tex]V = \frac{12.56}{3}* r^3[/tex]

[tex]V = 4.187* r^3[/tex]

At this point, assume that r = 3.

The expression becomes:

[tex]V = 4.187* 3^3[/tex]

[tex]V = 4.187* 27[/tex]

[tex]V = 113.05[/tex]

Answer:

I answered the first two Q but i dont know the third one sorryy

Step-by-step explanation: i put the answers as pics

Answer:

x = 3

Step-by-step explanation:

3x - X - 9 = 3(2 - x)  (Given)

2x - 9 = 3(2 - x) (combine like terms)

2x - 9 = 6 - 3x (distributive property of equality)

5x = 15 (addition property of equality)

x = 3 (division property of equality)

Ace

Answer:

20 years approx

Step-by-step explanation:

Step one:

given data

Principal= $1000

rate= 6%

Final amount A= $3300

Required

Time t

Step two:

the expression for the compound interest is given data

A= P(1+r)^t

t = ln(A/P) / r

substitute

t= ln(3300/1000)/0.06

t= ln3.3/0.06

t= 1.193/0.06

t=19.88 years

t= 20 years approx

Answer:

5,4

Step-by-step explanation:

Answer:

52 kilometers per hour

:)

Answer:

[tex]p = 4 \times 6 + 3 \times 5 - 19 = 20[/tex]

Step-by-step explanation:

Number of packs available with Alena initially = 4

Number of gums in each pack = 6

Total number of gums initially present with Alena can be found by multiplying the number of packs with the number of packs.

i.e. number of gums initially present with Alena = 4 [tex]\times[/tex] 6 = 24

Number of packs available with Hugh initially = 3

Number of gums in each pack = 5

Total number of gums initially present with Hugh can be found by multiplying the number of packs with the number of packs.

i.e. number of gums initially present with Hugh = 3 [tex]\times[/tex] 5 = 15

Total number of gums present initially = 24 + 15 = 39

Number of gums left with Alena and Hugh = 19

The number of gums chewed can be found by subtracting the number of gums left with them from the number of gums initially present with them.

i.e. Number of gums chewed, [tex]p[/tex] = 39 - 19 = 20

The equation that can be used is:

[tex]p = 4 \times 6 + 3 \times 5 - 19 = 20[/tex]

Answer: D. 53    [tex]a_{4}=53[/tex]

Step-by-step explanation:

[tex]a_{1}=4\\a_{2}=2(a_{1})+3\\a_{3}=2(a_{2})+3\\a_{4}=2(a_{3})+3[/tex]

[tex]a_{2}=2(a_{1})+3\\a_{2}=2(4)+3\\a_{2}=8+3\\a_{2}=11[/tex]

[tex]a_{3}=2(a_{2})+3\\a_{3}=2(11)+3\\a_{3}=22+3\\a_{3}=25[/tex]

[tex]a_{4}=2(a_{3})+3\\a_{4}=2(25)+3\\a_{4}=50+3\\a_{4}=53[/tex]

it's a I know this because I'm in the 8th

Step-by-step explanation:

it's a

Answer:

6

Step-by-step explanation:

add 18 on both sides

7w = 42

divide by 7 on both sides

w = 6

Answer:

Step-by-step explanation:

7w-18=24

7w= 24+18

w=42:7

w=6

Answer:

Always

Step-by-step explanation:

We know that,

As every natural number n be represented in a rational form: n/1, any natural number can be represented in the form p/q, where q≠0. Hence, all natural numbers are rational numbers.

Answer: 54 in.

Step-by-step explanation:  So, the problem does something a little sneaky, and that is they ask for the TOTAL amount of wood needed for triangle DFG.  And to find that, we simply have to multiply side AC by 3 to get side DG.  We do this because triangle ABC is 3 times as small as triangle DFG.   Then, add your side DG that you just got, (21) to side FG and FD to get the total amount of wood needed, 54 in.

The length of wood needed for triangle DFG is 54 inches

Start by calculating the side length DG in triangle DFG

The side lengths of DFG are three times the corresponding side length of ABC

So, we have:

[tex]DG = 3 \times AC[/tex]

[tex]DG = 3 \times 7\ in[/tex]

[tex]DG = 21\ in[/tex]

The perimeter of triangle DFG is then calculated as:

[tex]P = DF + FG + DG[/tex]

This gives

[tex]P = 15 + 18 + 21[/tex]

[tex]P = 54[/tex]

Hence, the length of wood needed is 54 inches

Read more about perimeter at:

https://brainly.com/question/24571594

Answer:

131.2 ft

Step-by-step explanation:

12.8*10.25=131.2

_______________________________

1lbs = 30min

________________________________

Answer:

Hydrogen = 13.4

Oxygen = 85.76

Carbon =  26.8

Step-by-step explanation:

H= 13.4

When you multiply by 1/10 all you have to do is move the decimal point to the LEFT.

So... 134←. = 13.4

_______________________________________________________

O= 85.76

134×[tex]\frac{16}{25}[/tex]=85.76

________________________________________________________

C= 26.8

134×[tex]\frac{1}{5}[/tex]=26.8

Answer:

y=68

x=12

Step-by-step explanation:

Variables= x and y

Lets make y the larger variable.

x+y=80

y=5x+8

substitution

x+5x+8=80

6x+8=80

x=12

plug 12 back in to find y

5(12)+8=68

y=68

x=12

Answer: Choice E)

The amount of calories in fruit juice increases by 2.5 for every one gram of sugar. The calorie amount estimated by this model is 57 if there are zero grams of sugar.

=============================================================

Explanation:

x = amount of sugar (in grams)

y = number of calories in the juice

ŷ = estimate of y, so its the estimate of calories in the juice

The regression equation rearranges to ŷ = 2.5x + 57

This is in the form y = mx+b where m = 2.5 is the slope and b = 57 is the y intercept.

The slope tells us what the rate of change is. Specifically, it tells us how much the amount of calories (y) is going up each time the amount of sugar (x) goes up. Each time x goes up by 1, y goes up by 2.5

The y intercept 57 is the starting or initial amount of calories. If you have 0 grams of sugar, the lowest amount of sugar possible, then you start off with 57 calories. We can see this by plugging x = 0 into ŷ = 2.5x + 57 (you should get ŷ = 57). Visually, the y intercept is where the line crosses the y axis.

All of these facts point to choice E as the final answer.

Answer:

e.

Step-by-step explanation:

calories is y or response variable and sugar is the explanatory variable, x.

if x(sugar) is 1

y = 57 + 2.5(1) = 59.5, a 2.5 increase.

if it is 2

y = 57 + 2.5(2) = 62, another 2.5 increase.

if zero grams of sugar x = 0

y = 57 + 2.5(0) = 57 calories.

Answer:

It would take the apprentice 14 hours to make the fireplace on his own.

Step-by-step explanation:

Let x represent the hours it takes the bricklayer to make a fireplace on his own and x + 10 represent the hours it takes the bricklayer's apprentice to make a fireplace on his own.

7/(x + 10) + 2/x = 1

7/(x+10) represents the fraction of the fireplace the bricklayer's apprentice made (total amount of time the bricklayer's apprentice worked on the fireplace/time it takes the bricklayer's apprentice to make a fire place on his own) while 2/x represents the fraction of the fireplace the bricklayer made (total amount of time the bricklayer worked on the fireplace/time it takes the bricklayer to make a fire place on his own). The 1 on the right side of the equation represents the number of fireplaces they made in that time.

Multiply both sides of the equation by x(x + 10) to get rid of the denominators:

x(x + 10)[7/(x + 10) + 2/x] = x(x + 10)1

x(x + 10)[7/(x + 10)] + x(x + 10)(2/x) = x(x + 10)

7x + 2(x + 10) = x² + 10x

7x + 2x + 20 = x² + 10x

Gather all the terms to one side of the equation:

x² + 10x - 7x - 2x - 20 = 0

x² + x - 20 = 0

Factoring the simplified equation:

(x + 5)(x - 4) = 0

Solving for each factor:

When x + 5 = 0,

x = -5

When x - 4 = 0,

x = 4

Since a negative solution wouldn't make sense for this question, it would take the bricklayer 4 hours to complete the fireplace on his own.

Substituting x = 4 into x + 10 to find out how long it would take the apprentice to make the fireplace on his own:

x + 10 = 4 + 10 = 14

Therefore, it would take the apprentice 14 hours to make the fireplace on his own.

Answer:

The answer is 245.7

Step-by-step explanation:

7 days in a week. 9 weeks. 9 x 7 = 63.

63 x 3.9 = 245.7

Answer:

Step-by-step explanation:

(5-2i) ( 5+2i) = (5^2) - ((2i)^2) = 25 - 4i^2

= 25 - 4(-1) = 25 +4 = 29 + 0i

The Solution is 29 + 0i.

The sum of a real number and an imaginary number is called a complex number. A complex number is usually represented by z and has the form a + ib. Here, both a and b are real numbers. The real part, denoted by Re(z), is represented by the value "a," and the imaginary part, represented by "b," is represented by Im(z). Also known as an imaginary number, ib.

Given Expression (5 – 2i)(5 + 2i)

we know a² - b² = (a - b)(a + b)

(5 – 2i)(5 + 2i) = 5² - (2i)²

= 25 - 4i²

and i² = -1

= 25 - 4(-1)

= 25 + 4 = 29

since the solution has 0i

so the equation is 29 + 0i

where a = 29 and b = 0

Hence, equation is 29 + 0i.

Learn more about complex numbers;

https://brainly.com/question/20566728

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Answer:

B

Step-by-step explanation:

3x6 is 18 so therefore its B