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miv72 [106K]
3 years ago
5

If a test is worth 90 points, how many points are needed to get a B?

Mathematics
2 answers:
nirvana33 [79]3 years ago
8 0

Answer:

70%

Step-by-step explananation:

sorry for the previous answer I was thinking u meant something else

Ainat [17]3 years ago
4 0

Answer:

A 70%

Step-by-step explanation:

Because when the top score is 100 then 80 is a B therefore you should just minus 20 from 90 and that should be your B score.

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In ΔABC, if m ∠A = m∠C, m∠B = ß (where ß is an acute angle), and BC = x, which expression gives the length of b, the side opposi
chubhunter [2.5K]

Answer:

The length of b is \sqrt{2x^2(1-cos\beta)}.

Step by step explanation:

Given information: In ΔABC, ∠A =∠C, ∠B = ß (where ß is an acute angle), and BC = x.

Since two angles are same therefore triangle ABC is an isosceles triangle and side AB and BC are congruent.

AB=BC=x

According to Law of cosine

b^2=a^2+c^2-2ac\cos B

b^2=x^2+x^2-2(x)(x)\cos \beta

b^2=2x^2-2x^2\cos \beta

b^2=2x^2(1-\cos \beta)

\sqrt{2x^2(1-cos\beta)}

Therefore the length of b is \sqrt{2x^2(1-cos\beta)}.

6 0
3 years ago
10
Mekhanik [1.2K]

Answer:

ithink 8470 the answer

Step-by-step explanation:

sana nakatulong

3 0
3 years ago
Read 2 more answers
Please help me <br>Due in an hour ​
vladimir1956 [14]
131.88 or jus do radius times 2 so 21+ 21 = 42.

42 x pi(3.14) = 131.88
3 0
2 years ago
Hypotenuse of triangle with sides of 36 and 39
worty [1.4K]

Answer: The hypotenuse is 53 (approximately)

Step-by-step explanation: In this question we shall apply the Pythagoras theorem which states that;

AC^2 = AB^2 + BC^2

Where AC is the hypotenuse and AB and BC are the two other sides. Having been given that the two other sides are 36 and 39 units respectively, the hypotenuse is now,

AC^2 = 36^2 + 39^2

AC^2 = 1296 + 1521

AC^2 = 2817

Add the square root sign to both sides of the equation

AC = 53.0754

Therefore the hypotenuse is approximately 53 units.

8 0
3 years ago
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vladimir1956 [14]

Answer:

-26 is the y-intercept

Step-by-step explanation:

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4 0
3 years ago
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