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3 years ago

If a= -5, what is the value of a^2-4/a+2

Mathematics

1 answer:

Luda [366]3 years ago

5 0

Answer:

-7

Step-by-step explanation: When a= 5, let's substitute all a's with 5 in the expression:

$\frac{a^{2}-4 }{a+2}\\\frac{(-5)^{2}-4 }{-5+2}\\\\\frac{25-4}{-3}\\\frac{21}{-3} \\= -7$

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HELPPP PLSSS 18. A triangle has verticesA(4,3), B(6,9) and C(2, -3). The triangle is rotated 90°

Mariulka [41]

Answer:

F and H are NOT true

Step-by-step explanation:

Rotation 90° CCW is represented by the transformation ...

(x, y) ⇒ (-y, x)

Then the rotated coordinates are ...

A(4, 3) ⇒ A'(-3, 4) . . . . . quadrant II

B(6, 9) ⇒ B'(-9, 6) . . . . . quadrant II

C(2, -3) ⇒ C'(3, 2) . . . . . quadrant I

The rotated figure will be congruent to the original, because rotation is a rigid transformation.

Consider the answer choices:

F: (-3, -4) is A' --- NOT true

G: triangles are congruent --- true

H: B is in quadrant III --- NOT true

J: (3, 2) is the coordinates of C' --- true

Both choices F and H are NOT true.

8 0

3 years ago

9 to the power 3 + 3 to the power 2 + 6 to the power 3 + 15 power 2 equals to how much

Llana [10]

Hey! So, here's a tip. When writing exponents, an easier way is to write a^b, rather than a to the b power. Besides that, here is your answer!

So-------

9^3=729

3^2=9

6^3=216

15^2=225

Now that we have that figured out, we can add them together, wish is simple. 729 + 9 + 216 + 225= 1,179.

Therefore, your final answer will be 1,174.

If you have any questions on this, I'm happy to help you. :)

3 0

3 years ago

Read 2 more answers

I need help with this question.

hammer [34]

Answer:

5c-5=45

Step-by-step explanation:

Since he didn't have the dessert you have to take away the five and the total was 45 which means something has to equal it.

6 0

2 years ago

Subtract<br><br>40(-32-40-25)<br>please show how you will do that (step by step)

sergeinik [125]

Answer:

-3880

Step-by-step explanation:

$40(-32-40-25)\\40(-72-25)\\40(-97)\\-3880$

Please give brainliest if this answer satisfies your question.

4 0

3 years ago

You recently purchased a new snowboard for the upcoming winter. The board, with bindings, came out to be $315.32. You were told

gizmo_the_mogwai [7]

First the original price is reduced by 15%
assume the original price is x
100%-15%=85%..u r left with 85% of the price
thus,85/100 multiply x
the reduced price is reduced again by 5%
so,95/100 ×(85/100 x)=$315.32
find x
323/400 x =$315.32
×=$390.49

7 0

3 years ago