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hjlf
3 years ago
15

Help me please please!!!!!!!!

Mathematics
1 answer:
vova2212 [387]3 years ago
6 0

Answer:

a

Step-by-step explanation:

The circumference (C) of a circle is calculated as

C = 2πr ( r is the radius ) , then

C = 2π × 20 = 40π

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Answer : -3/4 ..............

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3 years ago
Determine if Ginny factored correctly. If not, explain where she made an error. Ginny made a mistake in step 1 when she identifi
il63 [147K]

Quadratic equations are second-order equations. Ginney made a mistake when she identified b = 31. It should be b = –31.

<h3>What is a Quadratic Equation?</h3>

A quadratic equation is an equation that can be written in the form of

ax²+bx+c.

Where a is the leading coefficient, and

c is the constant.

In order to find the mistake that Ginny made, we will first find the factors ourselves, therefore, we will factorize the trinomial,

6x^2 - 31x -30 = 0

As we can see that the value of constants are,

a = 6

b = -31

c = 30

6x^2 - 31x -30 = 0\\\\6x^2 - 36x+5x -30 = 0\\\\6x(x-6)+5(x-6)=0\\\\(6x+5)(x-6)=0

Therefore, the factors of the trinomial 6x^2 - 31x -30 = 0 are (6x+5) and (x-6).

If we compare our process with Ginny's process, we will find that she has taken the value of the constant b as 31 which is wrong.

Hence, Ginney made a mistake when she identified b = 31. It should be b = –31.

Learn more about Quadratic Equation:

brainly.com/question/17177510

3 0
2 years ago
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Index notation 200 ..........................................
Tju [1.3M]

Answer:

I don't know if you're asking for the product of prime using index notation but I got :

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3 years ago
5-1+2x(4x4-12)x8<br><br> explain
Romashka [77]

First, do what's in the paranthesis:

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Multiplication first:

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Then subtract:

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We get:

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Multiply:

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8

Multiply, again:

8*8

64

We get:

5-1+64

Subtract:

5-1

4

Add:

4+64

Answer: 68

5 0
3 years ago
Read 2 more answers
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