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3 years ago

Can someone help me with 21 and 22 ??

Mathematics

2 answers:

liberstina [14]3 years ago

7 0

21. H) Subtract 4 from 9
22. D) comutative property of multiplication because we got two numbers multiplied that comuted

inna [77]3 years ago

3 0

Subtract 4 from 9 because parentheses first.
Commutative property because it just moved around

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Really need need help on this please

Alexxx [7]

Answer:

$\frac{7}{2}$

Step-by-step explanation:

$\frac{12-3y}{2} + y (\frac{2y-4}{y})$

we substitute the value of "y" in the equation:

$\frac{12-3(3)}{2} + 3 (\frac{2(3)-4}{3})\\\\\frac{12-9}{2} + 3 (\frac{6-4}{3})\\\\\frac{3}{2} + 3 (\frac{2}{3})\\\\\frac{3}{2} + 2\\\\\frac{7}{2}$

3 0

2 years ago

De las soluciones de la siguiente ecuación: x2 + 8x − 30 = 18? Cual es el numero de mayor valor Entre.

vekshin1

Answer:

The correct answer is "x = 4" and "x = -12".

Step-by-step explanation:

The given equation is:

⇒ $x^2+8x-30=18$

On subtracting "18" from both sides, we get

⇒ $x^2+8x-30-18=18-18$

⇒ $x^2+8x-48=0$

On applying factorization, we get

⇒ $x^2+12x-4x-48=0$

On taking common, we get

⇒ $x(x+12)-4(x+12)=0$

⇒ $(x-4)(x+12)=0$

⇒ $x-4=0$

$x=4$

or,

⇒ $x+12=0$

$x=-12$

4 0

3 years ago

A student with two summer jobs earns $10 per hour at a cafe and $8 per hour at a market the student would like to earn at least

JulsSmile [24]

Answer: the answer is 432 per day so in 2 days she/he will have just enough

Step-by-step explanation:

7 0

2 years ago

-Ready

Tems11 [23]

The inequality for this situation is given by 50 + p > 85

<h3>What is an inequality?</h3>

An inequality is an expression that shows the relationship between two or more numbers and variables.

Let p represent number of pages from Monday to Friday.

Jerome wants to have read at least 85 pages by the end of the day on Friday, hence:

50 + p > 85

The inequality for this situation is given by 50 + p > 85

Find out more on inequality at: brainly.com/question/24372553

7 0

2 years ago

In a random sample, 10 students were asked to compute the distance they travel one way to school to the nearest tenth of a mile.

elixir [45]

Answer:

Mean = 3.12, Variance = 3.324, Standard deviation = 1.8232

Step-by-step explanation:

Total number of students = 10 students.

Given data, 1.1, 5.2, 3.6, 5.0, 4.8, 1.8, 2.2, 5.2, 1.5, 0.8

To find the mean, at first we have to take the sum of all given data and then divide with the number of students.

Let the data is X, = 1.1, + 5.2, + 3.6, + 5.0, + 4.8, + 1.8, + 2.2, + 5.2, + 1.5, + 0.8 = 31.2

Mean = 31.2 / 10 = 3.12

$\text{Standard deviation, S} = \sqrt{\frac{\sum x^{2} - \left [ (\sum x)^{2}/n \right ]}{n-1}} \\S = 1.8232 \\\rm The \ Variance = S^{2} = 3.324$

5 0

2 years ago