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3 years ago

I NEED THE ANSWER FOR THIS TEST PLEASE Simplify -5+i/2i Show work

1 answer:

8 0

$\dfrac{-5+i}{2i}=\dfrac{-5+i}{2i}\cdot\dfrac{i}{i}=\dfrac{-5i+i^2}{2i^2}=\dfrac{-5i-1}{2(-1)}=\dfrac{5i+1}{2}=\dfrac{1}{2}+\dfrac{5}{2}i$

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The expression cos(A-B) - cos(A+B) is equal to

olchik [2.2K]

Cos (A-B) - cos (A+B)
= (cosAcosB +sinAsinB) - (cosAcosB - sinAsinB)
=2sinAsinB

Ans: 4

6 0

3 years ago

Read 2 more answers

Pepsi [2]

Answer:

B. x = 2

Step-by-step explanation:

Answer:

x = 2

Step-by-step explanation:

check by substituting each given value of x into the function

x = 0 ⇒ y = × 0² = 0

hence (0, 0) is correct

x = 2 ⇒ y = × 4 = 3

hence (2, 4 ) is incorrect

x = 3 ⇒ y = × 9 = 6

hence (3, 6 ) is correct

x = 5 ⇒ y = × 25 = 18

hence (5, 18 ) is correct

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2 years ago

Answer for number 12

aalyn [17]

Answer:

12 a. 4605 feet 12 b. 1,459,063 square feet

Step-by-step explanation:

For the perimeter, we simply add the lengths of each of the 5 sides together (or multiply 5 times one side length).

P = 5(921)

P = 4605 feet

For the area, we will use composition...add the area of the triangle to the area of the trapezoid.

For the area of the triangle, the formula is

$A=\frac{1}{2}bh$ .

Filling in our values gives us

$A=\frac{1}{2}(1490)(541)$ and

A = 403,045 square feet.

Now for the trapezoid. The formula for a trapezoid is

$A=\frac{1}{2}(b_{1}+b_{2})(h)$

where the b's represent the bases and the h represents the height. Filling in our values gives us

$A=\frac{1}{2}(921+1490)(876)$

Work inside the parenthesis first:

$A=\frac{1}{2}(2411)(876)$ and

A = 1,056,018

Now we add those together to get that area of the Pentagon is 1,459,063 square feet

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3 years ago

Find the volume of the object.

beks73 [17]

Answer:

896 inch^3

STAY SAFE, GOD BLESS YOU :)

Step-by-step explanation:

V = l x w x h

= 19 x 2 x 7

= 266 inch^3

= 6 x 15 x 7

= 630 inch^3

Add them both

= 630 + 266

= 896 inch^3

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3 years ago

Circle C is inscribed in triangle QSU. Circle C is inscribed in triangle Q S U. Points R, T, and V of the circle are on the side

Helga [31]

Answer:

40 units

Step-by-step explanation:

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3 years ago