can someone help please

Answer:

2i and -2i

Step-by-step explanation:

I'll change u to x to be easier to understand.

x^2 = -4

sqrt(x^2) = sqrt(-4)

sqrt(-4) = 2i, or -2i

Answer:

3/4

Step-by-step explanation:

I actually took this quiz a day ago!

The equation of the parallel line is: y = 1/2x + 5.

The slope (m) of parallel lines are the same.

Given the equation, y = 1/2x - 7, the slope (m) is 1/2. Therefore, the slope of the line that passes through (-4, 3) would be m = 1/2.

To find the y-intercept (b), substitute m = 1/2 and (x, y) = (-4, 3) into y = mx + b.

3 = 1/2(-4) + b

3 = -2 + b

3 + 2 = b

5 = b

b = 5

Substitute m = 1/2 and b = 5 into y = mx + b:

y = 1/2x + 5

The equation is: y = 1/2x + 5.

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Answer:

X = 1.4

Step-by-step explanation:

x + 14/x = -9

x + 14 = -9x

x + 9x = -14

10x = -14

X = -14/10

X = -1.4

Answer:

4 units ...................

Answer:

  $225

Step-by-step explanation:

When Mary pays the cost in 12 equal payments, each is 1/12 of the total amount.

__

  1/12 × $2700 = $225

Mary will have to pay $225 each month.

Answer:

-1.25

Step-by-step explanation:

2x - 7 = 3

x = -2y - 2

3 + 7 = 2x

x = 5

5 = -2y - 2

5 = -4y

5 = -4 times y

-

Answer:

20.00 units

Step-by-step explanation:

The distance between two points with coordinates

(-20,6) and (-20,-14) is:

20.00 units

(results are in decimal form, rounded to the nearest 100th)

Answer:

not a solution.. simple not needed to explain too

1.2x10^4

Step-by-step explanation:

2.

negative exponent means it's a fraction so

4.5x10^-3 is 1/4500 or 0.0045 so

it's a very small number

1.

^4 means means move the decimal 4 spots

12×10^4 = 12,000

3.

^3 means move the decimal 3 spots

3.8 x 10^3 =

3800

4.

7.5x10^3 =

7500

Step-by-step explanation:

Total= 19

Each holds 2 litres .

So it means, 19 -4= 15

You need 15 litres of oranges.

Answer: -1

Step-by-step explanation:

[tex]i^{34}=(i^{2})^{17}=(-1)^{17}=\boxed{-1}[/tex]

Answer:

x = 7 degrees

Step-by-step explanation:

The unlabelled angle at M   PLUS   12x + 24 = 180

  then   the unlabelled interior angle is  180 - (12x+24)

The sum of the interior angles then = 180

 80 + 4x  +     180-(12x+24) = 180

236 -8x = 180

x = 7

Answer:

12.56ftcube

Step-by-step explanation:

if V=(3.14×1^2)×4= 3.14 ×4=12.56

Answer:

46/99

explanation shown in the picture

Answer:

48-29

Step-by-step explanation:

22-3=19, so put on that makes 19.

Answer:

Answer:

Step-by-step explanation:

German  25%

Other 10%

American 50%

Japanese 15%

……………………………………………

6) the probability that the next car worked on

will be Japanese or German :

p(J∪G) = p(J) + p(G) = 15% + 25% = 40%.

…………………………………………………………

7) the probable number of Japanese cars :

[tex]6000\times \frac{15}{100} = 900[/tex]

The value of "t" in the given expression for the velocity of the object moving in the medium is t = u³ + 2.5u² + 2u.

The velocity of the object moving in the medium is given as;

t = ∫(3u² + 5u + 2)du

the value of t is obtained by integrating the function as follows;

t = (3u³)/3 + (5u²)/2 + 2u

t = u³ + 2.5u² + 2u

Thus, the value of "t" in the given expression for the velocity of the object moving in the medium is t = u³ + 2.5u² + 2u.

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Answer:

1/4, 7/8, 7/12, 9/16

LCM of 4,8,12,16 = 48

1/4= 1×12/4×12= 12/48

7/8= 7×6/8×6= 42/48

7/12= 7×4/12×4= 28/48

9/16= 9×3/16×3= 27/48

hence, 7/8 is the largest fraction. I hope it helps ya!!

The largest fraction is 7/8.

Least Common Multiple is defined as the smallest number that is a multiple of two or more numbers.

Given fractions,

1/4, 7/8, 7/12, 9/16

LCM of 4,8,12,16 = 48

1/4= 1×12/4×12= 12/48

7/8= 7×6/8×6= 42/48

7/12= 7×4/12×4= 28/48

9/16= 9×3/16×3= 27/48

Since the largest will be the fraction

NUMERATOR > DENOMINATOR

Hence, the largest fraction is 7/8.

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Answer:

The answer is B

Answer: Answer:

The perimeter of the polygon are

PQ = 5

RS = 5

PR = √74 = 8.60

QS = √74 = 8.60

QR = 7

Step-by-step explanation:

To calculate the perimeter of a polygon, polygon is like a coordinate with points, to find the length, we use this formula

d = √(x _2 - x_1)^2 + (y_2 - y_1)^2

Let's start from the first two vertices P ( 0 , 4) and Q(5 , 4)

x_1 = 0

y_1 = 4

x_2 = 5

y_2 = 4

PQ = √ ( 5 - 0)^2 + ( 4 - 4)^2

= √ 5^2 + 0^2

= √ 25

= 5

Between R( 5 , -3) and S ( 0 , -3)

x_1 = 5

y_1 = -3

x_2 = 0

y_2 = -3

RS = √ ( 0 - 5)^2 + ( -3 - (-3))^2

= √( -5)^2 + ( -3 + 3)^2

= √ 25 + 0

= √ 25

= 5

Between P( 0 , 4) and R (5 , -3)

x_1 = 0

y_1 = 4

x_2 = 5

y_2 = -3

PR = √( 5 - 0)^2 + ( -3 - 4)^2

= √ 5^2 + (-7)^2

= √ 25 + 49

= √ 74

= 8.60

Between Q ( 5 , 4) and S(0 ,-3)

x_1 = 5

y_1 = 4

x_2 = 0

y_2 = -3

QS = √ ( 0 - 5)^2 + ( -3 - 4)^2

= √ -5^2 + -7^2

= √ 25 + 49

= √ 74

= 8.60

Between Q( 5,4) and R(5 , -3)

x_1 = 5

y_1 = 4

x_2 = 5

y_2 = -3

QR = √ (5 - 5)^2 + ( -3 - 4)^2

= √ 0^2 + (-7)^2

= √ 0 + 49

= √ 49

= 7

Step-by-step explanation:

The volume of the given cone.

[tex]\large\boxed{Formula:V= \frac{1}{3}\pi{r}^{2}h}[/tex]

[tex]\large\boxed{\red \pi \red = \red 3 \red . \red 1 \red 4}[/tex]

Let's solve!

Substitute the values according to the formula.

[tex]V= \frac{1}{3}×3.14×{3}^{2}×8[/tex]

[tex]\large\boxed{V= 75.36 \: {yd}^{3}}[/tex]

Therefore, the volume of the given cone is 75.36 cubic yards.

Answer:

x2 + y2 = r2, and this is the equation of a circle of radius r whose center is the origin O(0, 0). The equation of a circle of radius r and center the origin is x2 + y2 = r2.

I think this is the answer.

She must win the next 8 consecutive games to get 80% and after that loose the next 12 games to get to 50%.

She has won 8 out of 12 days. Thus, percentage of winning is;

P(winning) = 8/12 * 100%

P(Winning) = 75%

To arrive at 80% winning, it means that the number of extra consecutive games she must win is;

(8 + x)/(12 + x) = 80/100

10(8 + x) = 8(12 + x)

80 + 10x = 96 + 8x

2x = 16

x = 8

Thus, she must win the next 8 consecutive games to get 80%.

For her to get to 50% after that, it means that;

(16 - x)/(20 - x) = 50/100

(16 - x)/(20 - x) = 1/2

2(16 - x) = 20 - x

32 - 2x = 20 - x

x = 12

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Using the t-distribution, it is found that the 95% confidence interval for the population mean rating for Miami is (5.73, 6.95).

The confidence interval is:

[tex]\overline{x} \pm t\frac{s}{\sqrt{n}}[/tex]

In which:

The critical value, using a t-distribution calculator, for a two-tailed 95% confidence interval, with 50 - 1 = 49 df, is t = 2.0096.

Considering the given sample, the other parameters are given as follows:

[tex]\overline{x} = 6.34, s = 2.16, n = 50[/tex]

Hence, the bounds of the interval are:

[tex]\overline{x} - t\frac{s}{\sqrt{n}} = 6.34 - 2.0096\frac{2.16}{\sqrt{50}} = 5.73[/tex]

[tex]\overline{x} + t\frac{s}{\sqrt{n}} = 6.34 + 2.0096\frac{2.16}{\sqrt{50}} = 6.95[/tex]

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realmente no lo se bro per necesito completar este paso

Answer:

Solution

-1

f

x=

1

-X+

2

Step-by-step explanation:

f(x=2x-7

Solving Steps

y=2x-7

Interchange the variables

x=2y-7

Swap the sides

2y-7=X

Move the constant to the right

2y=X+7

Divide both sides

1

y=

>+*.

7

2

Solution

-1

f

x=

1

-X+

2

the formula for distance between points is:

Distance = sqrt((x2-x1)^2 + (y2-y1)^2)

Using the points given:

Sqrt((3-7)^2 + (-1 - -2)^2)

Sqrt(-4^2 + 1^2)

None of the answer have a -4 but I think it should be B. Since it is the closest. Did you forget a negative sign when typing??

answer B.