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vova2212 [387]
3 years ago
15

Please help me for brainiest:(:(:(:(:(

Mathematics
1 answer:
Neko [114]3 years ago
7 0

Answer:

15. 1/3 (33%)

16. 1/6 (16.66%)

17. 1/2 (50%)

18. 1/2 (50%)

19. 1/1 (100%)

20. 0/1  (0%)

Step-by-step explanation:

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3[5x - 4] - [-30 - 45x]
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3(5x - 4) - (-30-45x)
= 15x - 12 + 30 + 45x <- Distributive Property
=60x + 18 <- Combine Like Terms

If you're trying to solve for 0:

0 = 60 x + 18
-18 = 60x <- Subtracted 18 from both sides
x = \frac{-18}{60} = \frac{-9}{30} <- Divided both sides by 60 and then simplified.

x = \frac{-9}{30} <- Fraction Form
x = -0.3 <- Decimal Form

Give Brainliest for simple answer plz :P
3 0
3 years ago
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If Martha earns $3.25 per hour for babysitting, how much will she earn in: 1.5 hours? 2.5 hours? 3.5 hours?
IgorC [24]
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6 0
3 years ago
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Interval does h have a negative average of change
NikAS [45]

The average rate of change over some interval [a, b] is equal to the slope of the secant line from (a, h(a)) to (b, h(b)).

h(t) is a quadratic function, so its graph is a parabola, and in particular it's one that has a minimum of -4 when t = 2.

The secant line over an interval [a, b] will have a negative slope if the distance from a to 2 is larger than the distance from b to 2.

(A) If a = 4 and b = 5, then |a - 2| = 2 and |b - 2| = 3, so the slope and hence average rate of change is positive.

(B) If a = -1 and b = 5, then |a - 2| = 3 and |b - 2| = 3, so this ARoC is zero.

(C) If a = 0 and b = 4, then |a - 2| = 2 and |b - 2| = 2, so this ARoC is also zero.

(D) If a = -1 and b = 4, then |a - 2| = 3 and |b - 2| = 2, so this ARoC is negative.

8 0
2 years ago
Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts​ (a) through​ (
Salsk061 [2.6K]

Answer:

13.05MbpS < x < 22.15 Mbps

Step-by-step explanation:

Confidence interval CI can be expressed in the form;

Lower bound < x < upper bound

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Lower bound = 13.046 = 13.05 Mbps (to two s.f.)

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So, the Confidence interval is given as;

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2 years ago
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