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zvonat [6]
3 years ago
5

7. In which step does a mistake first occur?

Mathematics
2 answers:
BartSMP [9]3 years ago
8 0

Answer:

8+2+

Step-by-step explanation:

dmitriy555 [2]3 years ago
6 0
PEMDAS is an acronym for the order of operations. Parentheses, exponents, multiplication, division, addition, subtraction.

For question 7:
8 + 2 + (3 x 3 -2)
I believe the mistake is in step 1. I believe it should be:
8 + 2 + (9 -2)

We go by order of operations from left to right.

For question 8, the mistake is in step 1. They divided 24 by 3 instead of adding. It should be:
(27 + 10) - 14 + 2
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Simplify (x − 4)(2x2 + 3x − 5).
xeze [42]

The simplified form of given expression is 2x^3-5x^2-17x+20

<em><u>Solution:</u></em>

Given that we have to simplify the expression

<em><u>Given expression is:</u></em>

(x-4)(2x^2+3x-5)

We can simplify the expression by multiplying each term in first bracket with each term term in second bracket

\rightarrow (x-4)(2x^2+3x-5)

\rightarrow (x)(2x^2)+(x)(3x)+(x)(-5)-4(2x^2)-4(3x)-4(-5)

Simplify the above expression by multiplying the numbers in each term and adding the coefficients of like variables in each term

\rightarrow 2x^3+3x^2-5x-8x^2-12x+20

Combine the like terms

\rightarrow 2x^3+3x^2-8x^2-5x-12x+20

\rightarrow 2x^3-5x^2-17x+20

Thus the expression is simplified

5 0
3 years ago
What is the slope of a line that is perpendicular to the line 2y – 3x = 8
tensa zangetsu [6.8K]

Answer:

The slope is 3/2 and the y intercept is 4

Step-by-step explanation:

Slope intercept form is

y = mx+b where m is the slope and b is the y intercept

2y -3x=8

Add 3x to each side

2y-3x+3x= 8+3x

2y = 3x+8

Divide by 2

2y/2 = 3/2x +8/2

y = 3/2x +4

The slope is 3/2 and the y intercept is 4

7 0
4 years ago
Que es la recta numerica
Gelneren [198K]

Answer:

Un ejemplo de una recta numérica es lo que un estudiante de matemáticas puede usar para encontrar la respuesta a las preguntas de suma y resta. Una línea recta, teóricamente que se extiende hasta el infinito en direcciones tanto positivas como negativas desde cero, que muestra el orden relativo de los números reales.

explanation:

what is the number line

An example of a number line is what a math student can use to find the answer to addition and subtraction questions. A straight line, theoretically extending to infinity in both positive and negative directions from zero, that shows the relative order of the real numbers.

8 0
3 years ago
-3 = За +6<br> Solve 2-step equations
Vaselesa [24]

Answer:

a=-3

Step-by-step explanation:

-3a=6+3

-3a=9

a=-3

7 0
3 years ago
20 POINTS!!!!WILL MARK AS BRAINLIEST HELP ME!!!!!!!!PLEASE!!!!!!!!!!
vladimir2022 [97]
I know that is q I proved it am sourious
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