Geometry help is very much needed

Mathematics

1 answer:

saul85 [17]3 years ago

5 0

It’s A because you’re looking for angle side angle. You already have two side by side angles. You just need a side the only side choice there is is A.

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Which expression is equivalent to (y2 + 3y – 8)+(2y? –y–9)?

Lisa [10]

Answer:

The answer is 42 have a great day.

Step-by-step explanation:

8 0

3 years ago

In the Math Club, 7 of the 20 girls are seniors, and 4 of the 14 boys are seniors. What is the probability of randomly selecting

Ivan

The answer is 21/34.

There are in total 34 children: 20 girls + 14 boys = 34 children
There are in total 11 seniors: 7 senior girls + 4 senior boys = 11 senior children

When we have two events that do not occur together, so only one of the events can happen (<span>there is OR in a sentence), then we use the addition rule and add up probabilities of the events. We have two events not occurring together:
</span>1. The probability of selecting a boy is 14/34 (because there are 14 boys among 34 children).
2. The probability of selecting a senior is 11/34 (because there are 11 seniors among 34 children).

Now, we just need to add them up. However, we have already counted 4 senior boys in the probability of the first event and thus, must subtract the probability of selecting a senior boys (4/34):
14/34 + 11/34 - 4/34 = (14+11-4)/34 = 21/34

5 0

3 years ago

Read 2 more answers

Calvin paints pictures and sells them at art shows. He charges $ 56.25 for a large painting. He charges $25.80 for a small paint

crimeas [40]

He made $ 394.90 because you need to add all the large paintings then the small ones then add them all

6 0

4 years ago

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Prove that 2√3÷5 is irrational

ELEN [110]

Answer:

To prove:

$\frac{2\sqrt{3}}{5}$ is irrational number.

Proof:

Let us first assume $\frac{2\sqrt{3}}{5}$ is a rational number.

So, it can be written as:

$\frac{2\sqrt{3}}{5}=\frac{a}{b}$ where $b\neq0$

Multiplying both sides by 5.

$5\times \frac{2\sqrt{3}}{5}=5\times \frac{a}{b}$

$2\sqrt{3}=\frac{5a}{b}$

Dividing both sides by 2.

$\frac{2\sqrt{3}}{2}=\frac{5a}{2b}$

$\sqrt{3}=\frac{5a}{2b}$

We see that $\frac{5a}{2b}$ is a rational number as it is in the $\frac{p}{q}$ form but we know $\sqrt3$ is irrational which makes the equation false making it contradicting with our assumption.