admin

2 months ago

Guest #2328

2 months ago

**Answer:**

The value of i3 is equal to D. -i

**Step-by-step explanation:**

We can find the answer by taking the definition of i :

i = sqrt(-1) (1)

i ^2 = (sqrt(-1)) ^2 = -1 (2) because square root and squaring are inverse operations

so from (2)

i ^3= i ^2* i = -1*i = -i

So -i is the final answer or – (sqrt(-1)) which is the same

Guest #2329

2 months ago

I^3 = i * i * i = i^2 * i = -1 * i = -i Answer

Its D

Its D

Question

The angle of elevation from point A to the top of a cliff is 38 degrees. If point A is 80 feet from the base of the cliff, how high is the cliff? A.
60.50 ft.
B.
62.50 ft.
C.
63.50 ft.
D.
61.50 ft.

Solution 1

Tan 38 = h/80

h = 80 tan 38 = 62.50 ft

Its B

h = 80 tan 38 = 62.50 ft

Its B

Question

What's the area of a square with a radius of 16 root 2

Solution 1

That's impossible to say. The radius of a square is meaningless.

Question

Share out £80 between Tom and jerry in the ratio 3:2

Solution 1

Tom gets- 48

Jerry gets- 32

Hope I helped! tell if I missed something! :)

Jerry gets- 32

Hope I helped! tell if I missed something! :)

Solution 2

So let's add variables according to the ratio:

3n + 2n = £80

5n = £80

n = 16

3(16):2(16)

48:32

**Tom gets ****£48, and Jerry gets ****£32**

3n + 2n = £80

5n = £80

n = 16

3(16):2(16)

48:32

Question

Will give brainliest-H(t)=-16t^2+28t T is time in seconds.
How long will it take for the dolphin to make one jump, show your work.

Solution 1

For this case we have the following equation:

H (t) = - 16t ^ 2 + 28t

When the dolphin finishes a jump, then the height is equal to zero.

We have then:

-16t ^ 2 + 28t = 0

We look for the roots of the polynomial:

t1 = 0

t2 = 1.75 s

Therefore, the dolphin takes 1.75 seconds to make a jump.

**Answer:**

**it will take for the dolphin to make one jump about:**

**t = 1.75 s**

H (t) = - 16t ^ 2 + 28t

When the dolphin finishes a jump, then the height is equal to zero.

We have then:

-16t ^ 2 + 28t = 0

We look for the roots of the polynomial:

t1 = 0

t2 = 1.75 s

Therefore, the dolphin takes 1.75 seconds to make a jump.

Question

X 0 2 4 6 8 f(x) 15 15.5 17 19.5 23 Write the quadratic function that corresponds to the given table of values in standard form, f(x) = ax2 + bx + c, where a, b and c are constants. f(x)=ax^2+bx+c

Solution 1

**Answer with Step-by-step explanation:**

We are given that:

f(x)=ax²+bx+c

also at x=0 f(x)=15

Putting x=0 in f(x)

a×0+b×0+c=15

⇒ **c=15**

now, f(2)=15.5

⇒ a×2²+b×2+c=15.5

⇒ 4a+2b+15=15.5

⇒ 4a+2b=0.5 -------(1)

f(4)=17

⇒ a×4²+b×4+c=17

⇒ 16a+4b+15=17

⇒ 16a+4b=2 --------(2)

equation (2)- 2×equation(1)

⇒ 16a+4b-8a-4b=2-2×0.5

⇒ 8a=2-1

⇒ 8a=1

⇒ a=1/8

⇒** a=0.125**

Putting value of a and c in equation (1)

⇒ 4×0.125+2b=0.5

⇒ 0.5+2b=0.5

⇒ 2b=0

⇒ **b=0**

**Hence **

**a=0.125**

**b=0**

**c=15**

**and f(x)=0.125x²+15**

Solution 2

F(x)=ax^2=bx=c is the answer

Question

What is the value of y? Triangle A B C has right angle C with hypotenuse labeled 6. Angle A is 60 degrees and its opposite side B C is labeled y.
Enter your answer, as an exact value, in the box.
y =

Solution 1

Y= 5.91 yup that’s the answer

Question

What number multiplies to 12 but adds to 16

Solution 1

x+y=16

xy=12

x+y=16

subtract x from both side

y=16-x

subsitute for y

x(16-x)=12

16x-x^2=12

subtract add x^2 to both sides

16x=12+x^2

subtract 16x from both sides

x^2-16x+12=0

try and factor

can't

use quadratic equation which is

ax^2+bx+c=0

x^2-16x+12=0

a=1

b=-16

c=12

subsitute

x=

x=

x=

x=

x=

x= or

the answer is

the numbers are and or

aprox 0.788897 and 15.2111

Solution 2

An answer would be 2

2+2+2+2+2+2=12

2*2*2*2=16

Another answer would be 4.

4+4+4=12

4*4=16

2+2+2+2+2+2=12

2*2*2*2=16

Another answer would be 4.

4+4+4=12

4*4=16

Question

Which of the following sets shows all the numbers from the set {2, 3, 4, 5} that are part of the solution to the inequality 4n + 6 > 22?

Solution 1

5 is the only number to satisfy the equation. If you were to plug in 2, 3, or 4, you'd get these results.

Solution 2

**Answer:**

the answer is

{2, 3, 4}

**Step-by-step explanation:**

if 5 is the only one that works and it has to be inequality so

{2, 3, 4} can be the only answer

Question

If 7 is subtracted from the product of 3 and a number, the result is 5 more than the number.

Solution 1

If you subtract 3-7 and add 9 to it the result is 5. 3-7+9=5

Question

The stem-and-leaf plot shows the number of people who used each run of the Red Line train. What is the range of the data? https://clackamasweb.owschools.com/media/g_mat08_ccss_2016/9/img_graph_stemandleaf.gif
51 125 74 78

Solution 1

I got the same question and I put 74. Hope this helps

Solution 2

**Answer:**

The stem-and-leaf plot shows the number of people who used each run of the Red Line train. What is the range of the data?

51

125

74

78

**Step-by-step explanation:**

**D. is right **

**HOPE IT HELPS *******

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