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3 years ago

20 POINTS AND WILL GIVE BRAINLIEST

Mathematics

1 answer:

Gemiola [76]3 years ago

4 0

Answer:

1. F=y/x

2. F(x)= fx

3. -6< x <-1

This is what I think, It look like it going to be the same answer for me but I don’t know if you want it

Step-by-step explanation: I try really I did

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A student says that 5x2=20, then x must be equal to 2. Do you agree or disagree with the student? Justify your answer.

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Answer:

i agree

Step-by-step explanation:

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3 years ago

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How much should you invest at 2.1% simple interest in order to earn $85 interest in 7 months?

Natasha_Volkova [10]

Answer:

$6938.78

Step-by-step explanation:

Interest = Principal x Rate x Time (in years)

let 'P' = Principal

85 = P × .021 × $\frac{7}{12}$

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3 years ago

If the first step in the solution of the equation 2x - 8 = 5x + 3 is "subtract 2x," then in the form of a paragraph, explain in

Ulleksa [173]

Answer:

step by step below.

Step-by-step explanation:

after subtracting the 2x, youd have 3x on the right side. and they you would want to get the numbers on one side, so subract the 3 to the left side. and then you would have -11.

$2x -8= 5x +3 \\-2x = -2x \\-8=3x+3 \\-3= -3 \\-11=3x \\$

solve for x if necessary

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3 years ago

For each function below, determine whether or not the function is injective and whether or not the function is surjective. Be su

olga55 [171]

Answer:

The function is neither injective nor surjective

Step-by-step explanation:

f: P({1,2,3}) -> N is given by f(A) = |A|

where P(S) denotes the power set of a set S and |A| the number of elements of A

$P(\left \{ 1,2,3 \right \})=\left \{ \varnothing ,\left \{ 1 \right \},\left \{ 2 \right \},\left \{ 3 \right \},\left \{ 1,2 \right \},\left \{ 1,3 \right \},\left \{ 2,3 \right \},\left \{ 1,2,3 \right \} \right \}$

$f(\varnothing )=0$

$f(\left \{ 1 \right \})=f(\left \{ 2 \right \})=f(\left \{ 3 \right \})=1$

$f(\left \{ 1,2 \right \})=f(\left \{ 1,3 \right \})=f(\left \{ 2,3 \right \})=2$

$f(\left \{ 1,2,3 \right \})=3$

The function is not injective, for

$P(\left \{ 1 \right \})=P(\left \{ 2 \right \})$

but

$\left \{ 1 \right \}\neq \left \{ 2 \right \}$

The function is not surjective either, because 5 is a natural number which is not the image of any element A under f, i.e., there is no element in A in P({1,2,3}) such that f(A)=5

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4 years ago

A $500 principal in a savings account paying an annual interest rate of 8% will earn $40 in interest at the end of the year. Int

hichkok12 [17]

I believe that is compound interest because not only is it applying interest to the $500, but it is applying it to the money you were given after this year.

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