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2 years ago

I do not understand how to work out this question please help

Mathematics

1 answer:

enot [183]2 years ago

8 0

a) To find the missing side length on triangle A, we can use the Pythagorean theorem.

a^2 + 12^2 = 13^2

a^2 + 144 = 169

a^2 = 25

a = 5 cm

5 and 12 = 5 and 12

b) The two triangles are congruent because they have two side lengths in common. If at least two side lengths are the same on two triangles, then they are congruent. In addition, these triangles have one angle in common as well.

Hope this helps!! :)

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In order to win a quiz contest, olga must score more than 400 points. She earns 12 points for each right answer, and loses 4 poi

Ket [755]

The inequality that represents the number of right answers (r) and wrong answers (w) Olga can give to win the contest is: $3r-w>100$

Explanation

Number of right answers is $r$ and number of wrong answers is $w$

Olga earns 12 points for each right answer and loses 4 points for each wrong answer.

So, total points earned for $r$ right answers $=12r$

and total points lost for $w$ wrong answers $=4w$

That means, her score will be: $(12r-4w)$ points.

In order to win the quiz contest, Olga must score more than 400 points. So, the inequality will be.......

$12r-4w>400\\ \\4(3r-w)>400\\ \\ 3r-w>100$

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3 years ago

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ryzh [129]

Answer:

Step-by-step explanation:

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2 years ago

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What is m∠ABC? Justify your reasoning. Using the addition property of equality, 40 + 15 = 55, so m∠ABC = 55°. Using the subtract

N76 [4]

Answer:

Using the Angle Addition Postulate, 15 + 40 = m∠ABC. So, m∠ABC = 55° after simplifying.

Step-by-step explanation:

The Angle Addition Postulate is gotten from angles placed side by side to form a resulting angle that is the sum of all the individual angles.

If D is the interior of ABC then, ABC is split into two parts i.e ABD and DBC, then the measure of ABC is the sum of the individual two parts

m∠ABC = m∠ABD + m∠DBC.

Using the Angle Addition Postulate:

m∠ABC = m∠ABD + m∠DBC

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3 years ago

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Delvig [45]

Answer:

why so many periods/dots whatever you wanna call them???

Step-by-step explanation:

Hope you have an amazing rest of your day/week!!!

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2 years ago

Which names are correct for PM−→− ?

Umnica [9.8K]

A non-arrowed line or double arrowed line segment can be named either ways of the points.
Therefore, another name for PM is angle MP.

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2 years ago

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