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3 years ago

9

What does -8/9 × -6/7 really equal

2 answers:

satela [25.4K]3 years ago

6 0

Answer:

16/21

Step-by-step explanation:

egoroff_w [7]3 years ago

6 0

It equals 16/21. If you actually multiply it, you should come out with 48/63. Simplify it to get 16/21

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In triangle ABC, angle A is 75o and angle B is 20o. Select the triangle that is similar to triangle ABC.

Arturiano [62]

Answer:

A. $\triangle$ DEF where $\angle D = 75^{\circ}$ and $\angle E = 20^{\circ}$ .

Step-by-step explanation:

At first we must keep in mind that two triangles are similar when they have same angle configuration, that is, each pair of angles is congruent. If $\triangle$ ABC and $\triangle$ DEF, then $\angle A \equiv \angle D$ and $\angle B \equiv \angle E$ . Hence, $\angle D = 75^{\circ}$ and $\angle E = 20^{\circ}$ .

In a nutshell, correct answer is A.

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4 years ago

How many times does the line y=-6 intersect with the circle x^2+y^2=36?

HACTEHA [7]

Answer:

a) The line intersects with the circle once.

b) Tangent

Step-by-step explanation:

We are given the following equation for the circle:

$x^2 + y^2 = 36$

How many times does the line y=-6 intersect with the circle?

We have to find the values of x when $y = -6$

So

$x^2 + y^2 = 36$

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$x^2 + 36 = 36$

$x^2 = 0$

$x = 0$

Since the line intersects the circle at one point, it is tangent to the circle.

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3 years ago