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4 years ago

Not sure how to answer question 4

Mathematics

2 answers:

laiz [17]4 years ago

8 0

D = 86
Because its the nearest degree to 90 as you see < BAC seems to be 90

drek231 [11]4 years ago

5 0

Answer:

<em>Option D is correct</em>

Step-by-step explanation:

Applying the cosine theorem for triangle ABC, you would have:

cos (angle BAC) = (BA^2 + CA^2 - BC^2)/(2*BA*CA)

= (10^2 + 18^2 - 20^2)/(2*10*18)

= 24/360

=> angle BAC = ~86 deg

Hope this helps!

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A file that is 252 megabytes is being downloaded. If the download is 14.4% complete, how many megabytes have been downloaded? Ro

8_murik_8 [283]

Answer:

36.3 megabytes

Step-by-step explanation:

14.4% x 252 = 36.3

4 0

4 years ago

Fruit:sugar in a ratio 2:3 if 8kg of fruit is used, how much sugar?

Vilka [71]

Hey there.

Considering our ratio from fruit to sugar is 2:3, this means we need to make a proportion. I will set this up below;

2:3 = 8:x; x is a variable substitute for our missing sugar value. Let's try to see if 2 divides into 8.
8 / 2 = 4; this means our scale factor of our ratio is 4x larger than the current value, so multiply 2 and 3 by 4 to solve for sugar.

2:3;

2 x 4 = 8; 8:x
3 x 4 = 12; 8:12.

12kg is the missing sugar value in our proportion; therefore, 12kg of sugar is used when 8kg of fruit is used.

I hope this helps!

6 0

4 years ago

What is the discontinuity and zero of the function f(x) = 3x^2 + x - 4 / x-1

7nadin3 [17]

Ans: Option (1) <span>Discontinuity at (1, 7), zero at ( negative four thirds , 0)
</span>
Explanation:
Given function:
$f(x) = \frac{3x^2 + x - 4}{x-1}$

Now if we plug in the x = 1, we would have discontinuity as function goes to infinity.

Now for f(1):
$f(x) = \frac{3x^2 + x - 4}{x-1} \\ f(x) = \frac{3x^2 + 4x - 3x - 4}{x-1} \\ f(x) = \frac{x(3x+4)-1(3x+4)}{x-1} \\ f(x) = \frac{(x-1)(3x+4)}{(x-1)} \\ f(x) = 3x+4 \\ now ~ insert ~ x=1: \\ f(1) = 3(1) + 4 = 7 \\ It~means~discontinuity~at~(1,7).\\ Now~let~us~find~zeros.\\ put~ f(x) = 3x+4 ~ equals~ to ~zero. \\ =\ \textgreater \ ~3x+4 = 0 \\ =\ \textgreater \ ~ x = \frac{-4}{3} \\ Hence~zeros=( \frac{-4}{3}, 0)$

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3 years ago

Estimate the value of

natka813 [3]

Answer:

8.0622577483

you can take it from here...

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3 years ago

A driver traveled 260 miles on the highway for 4 hours, driving at the same speed for the whole trip. write the ratio of miles t

aleksandrvk [35]

260 mi : 4 hrs.

unit rate - 65 mi : 1 hr.

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3 years ago