3 years ago

Let f(x) = -8x + 4 and g(x) = 3x2 + 5. Find f(7) + g(7) .

Mathematics

1 answer:

VMariaS [17]3 years ago

6 0

Answer:

-7

Step-by-step explanation:

substitute both x's for 7:

(-8(7)+4)+ (3(7)2+5)

= -54 + 47

= -7

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If I have an equation in which x = pounds, and y = total cost, can I substitute quarts into the equation

Colt1911 [192]

Answer:

Yes, you can

Step-by-step explanation:

As a point of reference, assume the equation is:

$y = 5x$

Where

$y = total\ cost$

and

$x = pounds$

In standard unit of conversion:

$1\ pound = 0.4793\ quart$

So:

$x\ pounds = 0.4793x\ quart$

Substitute 0.4793x for x in $y = 5x$

$y = 5 * 0.4793x$

$y = 2.3965x$

The above equation is the equivalent of $y = 5x$ in quarts

<em>So, irrespective of what the equation is, you can always substitute quarts into the equation.</em>

8 0

3 years ago

of the 88 keys on a piano,52 are white a.what friction of a piano's keys are white? b.what is the ratio of black keys to white k

Basile [38]

Answer:

52/88 or simplifed 13/22 and the ratio is 52:36

Step-by-step explanation:

8 0

3 years ago

Polygon C and polygon D are similar. The perimeter of polygon C is 48 inches, and the perimeter of polygon D is 12 inches. If on

SpyIntel [72]

The length is 2 inches.

48/12=4

8/4=2

3 0

3 years ago

15/18 -13/18 in simplest form

erma4kov [3.2K]

2/18 or 1/9 IS THE ANSWER :D

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3 years ago

Read 2 more answers

One of the legs of a right triangle measures 16 cm and its hypotenuse measures 20 cm. Find the measure of the other leg. If nece

lisov135 [29]

Answer:

Step-by-step explanation:

a^2 + b^2 = c^2

(16)^2 + b^2 = (20) ^2

b^2 = 400 - 256

b = $\sqrt{144}$ = 12

I hope im right!!

3 0

3 years ago