2 years ago

Can somebody help me with these questions?

Mathematics

1 answer:

skelet666 [1.2K]2 years ago

6 0

For 6, it's A. For 7, it's A, and for the last one, what's the question?

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4a/3-b/4=6 5a/6+b=13 Solve linear system by elimination

kondor19780726 [428]

$\bf \cfrac{4a}{3}-\cfrac{b}{4}=6
\qquad \qquad 
\cfrac{5a}{6}+b=13
\\\\\\
\textit{let us remove the denominators off those folks}\\
\textit{by multiplying the first one by 12, both sides}\\
\textit{and the second one by 6, both sides, thus}
\\\\\\
12\left( \cfrac{4a}{3}-\cfrac{b}{4} \right)=12(6)\implies 16a-4b=72
\\\\\\
6\left( \cfrac{5a}{6}+b \right)=6(13)\implies 5a+6b=78$

$\bf \textit{now, let's do the elimination}
\\\\

\begin{array}{llll}
16a-4b=72&\boxed{\times 3}\implies &48a-\underline{12b}=216\\\\
5a+6b=78&\boxed{\times 2}\implies &10a+\underline{12b}=156\\
&&--------\\
&&58a+0\quad=372
\end{array}$

solve for "a", once you get "a", plug it back into either equation to get "b"

3 0

2 years ago

Factor the following problems -13=-4a-2b+c 3=4a+2b+c 5=16a+4b+c Please Help!

Pie

1) -13 = -4a - 2b + c
-13 = -2(2a + b) + c

2) 3 = 4a + 2b +c
3 = 2(2a + b) + c

3) 5 = 16a + 4b + c
5 = 4(4a + b) + c

[ Final Answers are in bold ]

Hope this helps!

8 0

2 years ago

Uma empresa do ramo de confecções produz e comercializa calças jeans. Se x representa a quantidade produzida e comercializada (e

Semenov [28]

Answer:

I am in 5 classso i did not known answer

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2 years ago

(01.03) A box has dimensions of 17 inches long, 1.3 feet wide, and 8 inches high. What is the volume of the box? The formula for

VladimirAG [237]

To find the volume, just multiply width by height and then by length.
17 * 15.6 * 8 = 2121.6 inches^3

4 0

3 years ago

A local store has a puppy that weighs 72 ounces. How many pounds does the puppy weigh, given that 1 pound = 16 ounces?

Katyanochek1 [597]

Weight of a puppy in a local pet store = 72 ounces

Given ,

1 pound = 12 ounces

Then , 72 ounces will be equal to :

= 72 ÷ 12

= 6

Therefore , the weight of the puppy is 6 pounds .

8 0

3 years ago