2 years ago

Please help in math!!

Mathematics

2 answers:

Nostrana [21]2 years ago

7 0

Choice C. Because -1

LenaWriter [7]2 years ago

6 0

Answer: C

Step-by-step explanation:

Less than or more than without "or equal" means that the dot is not shaded, otherwise it is.

So the answer is C

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masha68 [24]

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Step-by-step explanation:

Given:

An isosceles triangle ABC with AB = AC.

∠A = $(4y+10)\°$

∠B = $75\°$

∠C = $(3x)\°$

We know that, for an isosceles triangle, the angles opposite equal sides are also equal to each other.

Therefore, ∠B = ∠C

⇒ $75 = 3x$

⇒ $x=\frac{75}{3}=25$

∴ ∠C = $3\times 25=75$ °

Now, the sum of all the interior angles of a triangle is always 180°.

$\angle A + \angle B + \angle C=180\\(4y+10)+75+75=180\\4y+10+150=180\\4y+160=180\\4y=180-160\\4y=20\\y=\frac{20}{4}=5$

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