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3 years ago

Please help me with this! I need this ASAP! Please help!

Mathematics

1 answer:

sladkih [1.3K]3 years ago

7 0

Answer:

The 2nd and 3rd boxes are right, that is :-

* 2b is a term

and

* 9 is a constant

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WORTH 20 POINTS!! HELP!!!

umka2103 [35]

Expenditures are negatives do I'd use -42.50

3 0

3 years ago

Does the equation −2x + y = 0 represent a direct variation? If so, identify the constant of variation.

Vikentia [17]

Adding 2x to both sides we get

y = 2x

This is direct variation where the constant is 2.

3 0

3 years ago

Help please:Suppose that x and y inversely, and x=10 when y=8 write the function that models the inverse variation

jarptica [38.1K]

SOLUTION

From the question, we are told that y varies inversely as x

This is mathematically written as

$\begin{gathered} y\propto\frac{1}{x} \\ \propto\text{ is a sign of proportionality } \end{gathered}$

Now, we will remove the proportionality sign and replace it with equal to sign =

If we do this, we will intoduce a constant k

$\begin{gathered} y\propto\frac{1}{x} \\ y=k\times\frac{1}{x} \\ y=\frac{k}{x} \end{gathered}$

So we have the formula

$y=\frac{k}{x}$

We will substitute the values of x for 10 and y for 8 into the formula to get k, we have

$\begin{gathered} y=\frac{k}{x} \\ 8=\frac{k}{10} \\ k=8\times10 \\ k=80 \end{gathered}$

Now, we will substitute k for 80 back into the formula to get the inverse function, we have

$\begin{gathered} y=\frac{k}{x} \\ y=\frac{80}{x} \end{gathered}$

Hence the answer is option C

7 0

1 year ago

Maya starts with $300 in her bank account. Each month she spends $40. What is the slope in this equation , and what is the y- in

Neporo4naja [7]

Answer: y=<em>300</em>-40x

The <em>y-intercept</em> would be 300

The slope would be -40

Step-by-step explanation:

x=number of months

300 is the amount she starts with

Equation can also be written like so; y=-40x+300 just like in y=mx+b (slope intercept) form

6 0

3 years ago

Multiply -4/9 x -7/8 Write fractions in simplest form.

Ray Of Light [21]

Answer:

7/18

Step-by-step explanation:

-4 × -7

9 × 8

28/72, which would simplify to 7/18

8 0

3 years ago