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ziro4ka [17]
2 years ago
7

Which expression is equivalent to 13x(9y – 12)? A. 3xy − 4 B. 3xy − 4x C. 3xy − 12 D. 3y − 4x

Mathematics
1 answer:
KonstantinChe [14]2 years ago
4 0

Answer:

<h2>B. 3xy − 4x</h2>

Step-by-step explanation:

step one:

Given the expression  13x(9y – 12) we are expected to expand the expression to obtain a similar expression given in the options

step two

we proceed by

= 13x(9y-12)\\\\=(117xy-156x)

step three

we proceed to both terms in the expression

bt a common factor which is 39

\frac{117xy}{39}-\frac{156x}{39}

3xy-4x

From our analysis, the option D matches the expression

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Please show your work.​
Nastasia [14]

Answer:

1. 8.19, 2. 25.96, 3. 3.95

Step-by-step explanation:

use soh cah toa

1. cos is adjacent/hypotenuse

cos73=x/28

multiply both sides by 28

28cos73=x=8.186

2. sin is opposite over hypotenuse

sin68=x/28

multiply both sides by 28

28sin68=x=25.961

3. sin is opposite over hypotenuse

sin26=x/9

myltiply both sides by 9

9sin26=x=3.945

8 0
2 years ago
Bobby read a total of 20 books over 2 months. If Bobby has read 90 books so far, how many months has he been with his book club?
tatuchka [14]

Step 1

From the question;

\begin{gathered} Bobby\text{ reads 20 books in 2 months} \\  \end{gathered}

We are required to find how many months it will take him to read 90 books

Step 2

We will use the ratio below to solve the problem.

\begin{gathered} \frac{20\text{ books}}{90\text{ books}}=\frac{2months}{x} \\ x=months\text{ to read 90books} \\ x=\frac{90\times2}{20} \\ x=9\text{ months} \end{gathered}

Answer; It will take Bobby 9months to read 90 booj

9\text{ months}

8 0
8 months ago
Determine whether y^2=x^2- 3 is a function ?
Sav [38]
It is not . There are multiple x values for the y values.
8 0
2 years ago
Tina constructed triangle XYZ.
Oxana [17]

Answer:

It's D... Isosceles and right

Step-by-step explanation:

got it right on the quiz.

7 0
3 years ago
Solve the problem By using area models Problem: shereen 119 books into 7 even piles .How many books did shereen put in each pile
goblinko [34]

Answer:

the 17 books should be put in each pile

Step-by-step explanation:

The computation of the number of books in each pile is shown below:

Given that

There are 119 books

And there are 7 piles

So, the number of books in each pile is

= 119 books ÷ 7 piles

= 17 books

Hence, the 17 books should be put in each pile

So the same is to be conisdered and relevant too

4 0
2 years ago
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