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kherson [118]
3 years ago
9

Add 12xy − 3p2q2 + 7pq − 8r2 and 2xy + 3p2q2 − 8pq + 4r Please help me quick

Mathematics
2 answers:
Alex17521 [72]3 years ago
7 0
Ex 9.1, 3 (iii) - Chapter 9 Class 8 Algebraic Expressions and Identities ... Davneet Singh is a graduate from Indian Institute of Technology, ...
Whitepunk [10]3 years ago
3 0

Answer:

12xy - 3 {p}^{2}  {q}^{2}  + 7pq - 8 {r}^{2}  \\  +  \\ 2xy + 3 {p}^{2}  {q}^{2}  - 8pq + 4r \\  = 14xy - pq - 4r

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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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Simplify the following monomials pls
velikii [3]

Answer:

1.) a^4b

2.) p^3q^4

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5.) 2a^3b^5

I hope this helps:

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A data set is normally distributed with a mean of 27 and a standard deviation of 3.5.
VLD [36.1K]

Answer: -0.57

Step-by-step explanation:

z-score: data - mean / standard deviation

25 - 27 / 3.5

= -0.57

8 0
3 years ago
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