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2 years ago

Which choice shows a function with a domain of {-4, -2, 2, 4)?

Mathematics

2 answers:

Luden [163]2 years ago

7 0

Answer:

C {(-4, 2), (-2, 1), (2, 0), (4, 5)}

Step-by-step explanation:

The domain is the set of x-values for which the function is defined.

<h3>Choices</h3>

A) The relation is <em>only defined for x=2</em>. It is not a function, because x=2 maps to an infinite number of y-values.

B) The domain is an infinite number of x-values. The listed values are included in the domain, but they are <em>not the entire domain</em>.

C) The list of first-values in the ordered pairs is the domain of the function it matches the given domain.

D) The list of first-values in the ordered pairs is <em>not the same as the given domain</em>.

elixir [45]2 years ago

7 0

Answer: C(-4,2), (-2,1), (2,0), (4,5)

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3 years ago

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Solve for x in the equation 9- x/4=2

jeka57 [31]

Answer:

9-x/4=2

$\frac{36 - x}{4} = 2$

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3 years ago

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4th grade math question Joey walk 333 ft how many yards did Joey walk? At 5 yds vs 15 ft

icang [17]

111 yards

Explanation

Step 1

to solve this we need to know the equivalence

$\begin{gathered} 3\text{ ft= 1 yd} \\ 3\text{ ft}\leftrightarrow1\text{ yd} \end{gathered}$

Now, we can apply a rule of three

let x represents the number of yards in 333 ft, so

$\begin{gathered} if \\ 3\text{ ft}\rightarrow\text{ 1 yd} \\ \text{then} \\ 33\text{ ft}\rightarrow x \end{gathered}$

as the ratio is the same, we have a proportion

$\begin{gathered} \frac{3\text{ ft}}{1\text{ yd}}=\frac{33\text{ ft}}{x\text{ yd}} \\ \frac{3}{1}=\frac{33}{x} \end{gathered}$

Step 2

now, solve for x

$\begin{gathered} \frac{3}{1}=\frac{333}{x} \\ \text{cross multiply} \\ 3\cdot x=333\cdot1 \\ 3x=333 \\ \text{divide both } \\ \frac{3x}{3}=\frac{333}{3} \\ x=111 \end{gathered}$

so, the answer is 111 yards

I hope this helps you

8 0

1 year ago

If logM/N=5 and logP/N=7, what can you say about the relationship between M and P?. . A. M=2P. B. P=2M. C. P=100M. D. P=10M

liubo4ka [24]

<span>log (M/N) = log M - log N
so log M - log N = 5
log (P/N) = log P - log N
so log P - log N = 7
If you subtract equation 2 from equation 1, you have log M - log P = -2
That means that log (M/P) = -2 ----> 10^-2 = M/P ---> P = 100M</span>

8 0

3 years ago

What is the value of this expression when a = 3 and b = -2?

weqwewe [10]

The first step: Simplify the expression with:

$\dfrac{x^n}{x^m}=x^{n-m}\\\\(xy)^n=x^ny^n\\\\(x^n)^m=x^{nm}\\\\x^{-n}=\dfrac{1}{x^n}$

$\left(\dfrac{3a^{-2}b^6}{2a^{-1}b^5}\right)^2=\left(\dfrac{3}{2}a^{-2-(-1)}b^{6-5}\right)^2=\left(\dfrac{3}{2}a^{-1}b^1\right)^2\\\\=\left(\dfrac{3}{2}\right)^2(a^{-1})^2b^2=\dfrac{9}{4}a^{-2}b^2=\dfrac{9b^2}{4a^2}$

The second step: Put the values of a = 3 and b = -2 to the expression:

$\dfrac{9(-2)^2}{4(3)^2}=\dfrac{(9)(4)}{(4)(9)}=1$

<h2>Answer: 1</h2>

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4 years ago

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