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Andrei [34K]
2 years ago
9

Let f(x) = 5x ^ 2 - x + 1 and g(x) = - 3x . Evaluate the composition (fg)(1)

Mathematics
2 answers:
ANEK [815]2 years ago
8 0

9514 1404 393

Answer:

  -15

Step-by-step explanation:

(fg)(1) = f(1)×g(1) = (5×1² -1 +1)×(-3·1) = (5)×(-3)

(fg)(1) = -15

nlexa [21]2 years ago
5 0
F(x) = 5(-3x) ^2 - (-3x) + 1
f(x) = -8x ^2 + 3x + 1
f(x) = -8x ^3 + 3x
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the sum of the speeds of two trains is 721.6 miles per hour. if the speed of the first train is 8.4 mph faster than that of the
olya-2409 [2.1K]

Subtract the faster speed:

721.6 - 8.4 = 713.2

Divide by 2 trains:

713.2/2 = 356.6

The slower train is going 356.6 miles per hour.

The faster train is going 356.6 + 8.4 = 365 miles per hour.

4 0
3 years ago
1.25÷16.25 ibtried doing it but dont dont know how
weqwewe [10]
16 divided by 1
is 16 with remainder 0
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5 0
3 years ago
(25 points) A construction crew is lengthening a road. Let y represent the total length of the road (in miles). Let x represent
Tresset [83]

Answer:

L=193

Step-by-step explanation:

Initial length of the road =57mi

L= Total length

D=number of days worked

Number of miles added in 1 day= 4mi

Therefore,

L=57+D*4

After 34 days,

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L=193mi

8 0
3 years ago
Someone help plz correct answers only and explain how you got the answer
Harrizon [31]
Δ YX Z   And Δ VUW are SIMILAR because all their respective angles are congruent:

∠ y = 90°; ∠ v = 90°
∠ x = 67°; ∠ u = 67°
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7 0
3 years ago
Your math test has 38 questions and is worth 200 points. This test consists of multiple-choice questions worth 4 points each and
Furkat [3]

Answer: the number of multiple-choice questions in the math test is 35 and the number of open-ended questions in the math test is 3

Step-by-step explanation:

Let x represent the number of multiple-choice questions in the math test.

Let y represent the number of open-ended questions in the math test.

The math test has 38 questions. It means that

x + y = 38

This test consists of multiple-choice questions worth 4 points each and open-ended questions worth 20 points each. The total number of points is 200. It means that

4x + 20y = 200 - - - - - - - - - -1

Substituting x = 38 - y into equation 1, it becomes

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y = 3

Substituting y = 3 into x = 38 - y, it becomes

x = 38 - 3 = 35

8 0
3 years ago
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