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3 years ago

5c +2d=13 2c + 4d = -6

Mathematics

1 answer:

Margarita [4]3 years ago

4 0

Answer:

combine like terms and u'll have ur answer

Step-by-step explanation:

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If point C is between points A and B, then AC + CB = ___.

mario62 [17]

The correct answer is: AB

Explanation:

There are two ways you can understand this:

1. By drawing:

A ------ C ------B

As you can see the point C is between A and point B, hence AC + CB = AB. One thing to remember here is that point C can be anywhere between the point A and B, in that case, the answer will remain be the same AB. For instance:

A --- C -------------B

Again, AC + CB = AB.

2. By inference:

If the point C is between points A and B, it means that the point C lies on the line AB; if point C were not on the line AB, it will not be between points A and B. Hence, you can infer that AB is a line and point C lies on it and is between points A and B.

7 0

3 years ago

Read 2 more answers

Given that f ( x ) = 8 x + 5 f ( x ) = 8 x + 5 and g ( x ) = 3 − x 2 g ( x ) = 3 - x 2 , calculate f(g(0))

Alex17521 [72]

Answer:

Step-by-step explanation:

g(0)=3-2(0)

= 3

f(3) = 8(3)+5

f(3) = 29

5 0

2 years ago

In digging a hole, the construction crew records the depth of the hole relative to the ground level. The starting depth is zero

Bond [772]

I don't know how to solve this but im pretty sure the table is needed so you should atleast take a picture or just type it out

4 0

2 years ago

There are 36 birds sitting on a wire. Six-twelfths of the birds are black. How many black birds are sitting on the wire?

Damm [24]

18 black birds are sitting on the wire.

Six-twelfths is equal to one half when simplified. Divide 36 by 2 to find the half, and get 18.

5 0

2 years ago

Read 2 more answers

If x+y = 1, and x^2 + y^2 = -1, what is x^7 + y^13? 1) 0 2) 1 3) -2 4) 2 5) -1

damaskus [11]

Solve for x and y :

x + y = 1 → y = 1 - x

x ² + y ² = -1

x ² + (1 - x)² = -1

x ² + (1 - 2x + x ²) = -1

2x ² - 2x + 1 = -1

2x ² - 2x + 2 = 0

x ² - x + 1 = 0

x ² - x + 1/4 = -3/4

(x - 1/2)² = -3/4

x - 1/2 = ±√(-3/4)

x - 1/2 = ±√3/2 i

x = 1/2 ± √3/2 i → x = exp(± iπ/3)

y = 1 - (1/2 ± √3/2 i ) → y = -1/2 ± √3/2 i → y = exp(± 2iπ/3)

Then

x ⁷ + y ¹³ = exp(± 7iπ/3) + exp(± 26iπ/3)

… = exp(± iπ/3) + exp(± 2iπ/3)

since 7π/3 is equivalent to π/3, and 26π/3 is equivalent to 2π/3 (both modulo 2π).

In either case, we get

x ⁷ + y ¹³ = x + y = 1

so the answer is (2) 1.

8 0

2 years ago