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3 years ago

Can some answer these math questions asap thanks

Mathematics

1 answer:

Alexus [3.1K]3 years ago

4 0

Answer:

3.) 63=3x+7y

4.) Y-intercept is 9

Step-by-step explanation:

(For 3) For every time a person gets a touchdown, x represents that

for every time a person person scored a successful extra-point attempt, y represents that.

And they team scores 63, so....

the equation would look like this

63=3x+7y

(For 4) You find the y-intercept by turning the standard form equatio into the slop intercept form

$(-3x)63=3x+7y (-3x)\\(\frac{1}{7}) 7y=(-3x+63)(\frac{1}{7} )\\y=-\frac{3x}{7} +9$

(Helper's note, multiplying by its reciprocal is the same as dividing it by a whole number, in the case dividing the number by 7 is the save as multiplying the number by $\frac{1}{7}$ )

Then plugging x=0 and solve for y, which in this case, y=9

$y=\frac{-3(0)}{7} +9\\y=9$

(For the graphing) Turn 63=3x+7y into a slope intercept form, which is $y=-\frac{3x}{7} +9$ and graph from there

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2 years ago

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3 years ago

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4 years ago

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3 years ago

Function f is an exponential function. It predicts the value of a famous painting, in thousands of dollars, as a function of the

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Answer:

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$f(x)=8 \cdot (\frac{5}{4})^x$

$f(x)=8 \cdot (1.25)^x$

Step-by-step explanation:

We are going to see if the exponential curve is of the form:

$y=a \cdot b^x$ , ( $b\neq 0$ ).

If you are given the $y-$ intercept, then $a$ is easy to find.

It is just the $y-$ coordinate of the $y-$ intercept is your value for $a$ .

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So $a=8$ .

So our function so far looks like this:

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Now to find $b$ we need another point. We have two more points. So we will find $b$ using one of them and verify for our resulting equation works for the other.