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Roman55 [17]
3 years ago
9

If f(x) = x^2 + x, find f(-3)

Mathematics
2 answers:
lana [24]3 years ago
5 0
F(x) = x^2 + x
f(-3) = (-3)^2 + (-3)
f(-3) = 9 - 3
f(-3) = 6
Tpy6a [65]3 years ago
3 0
6, because f(-3)= (-3)^2+(-3) = 9-3. Remember to view f(x) as a 'machine' with a slot. Wherever ther's an 'x' put the value.
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After arianna completed some work, she figured she still had 78 21/100 pictures to paint. if she completed another 34 23/25 pict
dezoksy [38]

Subtract the number she completed from what she had left to paint originally.

The fractions have different denominators so first step is to rewrite the fractions with a common denominator.

23/25 can be rewritten as 92/100

Now you have 78 21/100 - 34 92/100

Because 21/100 is smaller than 92/100 subtract 1 whole number from 78 and rewrite 1 as 100/100 and add that to the fraction.

78 21/100 becomes 77 121/100

Now subtract :

77 121/100 - 34 92/100

77-34 = 43

And 121/100 - 92/100 = 29/100

Combine to get 43 and 29/100

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3 years ago
Can someone help me on this question.
Temka [501]
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7 0
4 years ago
Read 2 more answers
Composition of functions Find g (f(x)) for the following problems
beks73 [17]

1.

f(x)=-3x\qquad g(x)=5x-6\\\\g(f(x))=5(-3x)-6=\boxed{-15x-6}

2.

f(x)=x-6\qquad g(x)=x^2+6x-2\\\\g(f(x))=(x-6)^2+6(x-6)-2=x^2-12x+36+6x-36-2=\\\\=\boxed{x^2-6x-2}

3.

f(x)=4x+3\qquad g(x)=2x^2-x+1\\\\g(f(x))=2(4x+3)^2-(4x+3)+1=2(16x^2+24x+9)-4x-3+1=\\\\=32x^2+48x+18-4x-3+1=\boxed{32x^2+44x+16}

4.

f(x)=2x^2\qquad g(x)=8x^2+3x\\\\g(f(x))=8(2x^2)^2+3(2x^2)=8\cdot4x^4+6x^2=\boxed{32x^4+6x^2}

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3 years ago
Rita ran 2 km 30 m in a 10 km marathon. How much more distance she has to cover to finish the marathon?
vichka [17]

Answer:

7.970km

Step-by-step explanation:2km 30m=2000m+30m=2030m  (1km=1000m)

total distance is 10km which is 10000m.

10000m Minus 2030m equals 7970m so this give's us the answer of 7.97km (7.970km) Hope this helps!

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2 years ago
PLS HELP I NEED TO FIND THE ACTUAL DISTANCE BETWEEN WACH OAIR IF CITIES AND IF NECESSARY I HAVE TO ROUND TO THE NEAREST TENTH
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I hoped this helped

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