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3 years ago

How do I do this I don’t understand?

Mathematics

1 answer:

Hoochie [10]3 years ago

8 0

Answer:

y less then5

Step-by-step explanation:

everything in he store is less than 5

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The sixth-graders at Lester's school got to visit either the science museum or the history museum. 21 students picked the scienc

Lina20 [59]

21 + 28 = 49 students

Ration of history 21 to students 49 = d)21:49

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3 years ago

A miner has 3 kilograms of gold dust. She needs to share it evenly with four partners. How much gold should each of the five peo

djverab [1.8K]

600 g

Explanation:
Since 1 kilogram =1000 grams
Therefore 3 grams= 3000 grams
Now divide it with 5 partners
3000 divided by 5=600 grams

Each person will get 600 grams of gold dust

6 0

3 years ago

Prove that a triangle with the sides a - 1 cm to root under a

vivado [14]

Question is Incomplete, Complete question is given below.

Prove that a triangle with the sides (a − 1) cm, 2√a cm and (a + 1) cm is a right angled triangle.

Answer:

∆ABC is right angled triangle with right angle at B.

Step-by-step explanation:

Given : Triangle having sides (a - 1) cm, 2√a and (a + 1) cm.

We need to prove that triangle is the right angled triangle.

Let the triangle be denoted by Δ ABC with side as;

AB = (a - 1) cm

BC = (2√ a) cm

CA = (a + 1) cm

Hence,

${AB}^2 = (a -1)^2$

Now We know that

$(a- b)^2 = a^2+b^2 - 2ab$

So;

${AB}^2= a^2 + 1^2 -2\times a \times1$

${AB}^2 = a^2 + 1 -2a$

Now;

${BC}^2 = (2\sqrt{a})^2= 4a$

Also;

${CA}^2 = (a + 1)^2$

Now We know that

$(a+ b)^2 = a^2+b^2 + 2ab$

${CA}^2= a^2 + 1^2 +2\times a \times1$

${CA}^2 = a^2 + 1 +2a$

${CA}^2 = AB^2 + BC^2$

[By Pythagoras theorem]

$a^2 + 1 +2a = a^2 + 1 - 2a + 4a\\\\a^2 + 1 +2a= a^2 + 1 +2a$

Hence, ${CA}^2 = AB^2 + BC^2$

Now In right angled triangle the sum of square of two sides of triangle is equal to square of the third side.

This proves that ∆ABC is right angled triangle with right angle at B.

4 0

3 years ago

The table below shows the movie preferences of high school and college students:

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<span>C. She calculated the conditional relative frequency for comedy films that are liked by college students. The correct answer is 28%. hope this helps please mark me as brainliest

</span>

8 0

3 years ago

Read 2 more answers

Please help I'll give brainliest!!!

olya-2409 [2.1K]

Answer:53

Step-by-step explanation:

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3 years ago