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3 years ago

What is BC? Enter your answer in the box?

Mathematics

2 answers:

fgiga [73]3 years ago

8 0

the tickmarks on the vertices of B and C mean that those angles are twins, which means that the sides AB = AC, which means is an isosceles triangle.

now if AB = AC, then

$\bf 8x-4=5x+11\implies 3x=15\implies x=\cfrac{15}{3}\implies \boxed{x=5} \\\\\\ BC\implies 4x-2\implies 4(5)-2\implies 18$

Rufina [12.5K]3 years ago

7 0

Answer:

18 is your answer

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Determine whether f is a function from the set of all bit strings to the set of integers if

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3 years ago

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B.8 ft by 3 ft.

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3 years ago

A number is doubled, then decreased by 13.7. The result is greater than 125.28. What is the smallest integer that satisfies this

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Answer:

x > 69.49

Step-by-step explanation:

Step 1: Write out equation

2x - 13.7 > 125.28

Step 2: Add 13.7 to both sides

2x > 138.98

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x > 69.49

So x has to be greater than 70 in order to fit into the question context.

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4 years ago

To compare two products such as colas, a random sample is selected to taste two types of colas (A and B). Each selected subject

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Answer: The sample size would be needed = 385

Step-by-step explanation:

Let p be the prior population proportion.

Margin of error = E

When not estimate of p is given , the formula to calculate the minimum sample size n = $0.25(\dfrac{z^*}{E})^2$ , where z* = critical value for given confidence interval.

Here z* for 95% confidence level is 1.96.

E=5%=0.05

Then $n=0.25(\dfrac{1.96}{0.05})^2\approx385$

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3 years ago