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3 years ago

Julio wants to solve the system shown using the elimination method. Which is the best way to begin?

Mathematics

1 answer:

ElenaW [278]3 years ago

4 0

Answer:

B. Multiply each term in x - 12y = 2 by 4 and add it to the other original equation.

Step-by-step explanation:

The expression are two linear equation and can be solved simultaneously

$x - 12y = 2------------------1$

$-4x + 7y = 12----------------------2$

1. we need to multiply each term in eqn 1 by 4 and add it to the other

original equation(2).

$4x - 48y = 8----------------3\\-4x + 7y = 12---------------2\\\\$

Adding both 3 and 2 we have

$4x - 48y = 8----------------3\\-4x + 7y = 12---------------2\\\\\\$

2. once we have gotten the value of y

we then substitute it in any of the equations to solve for x

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AfilCa [17]

To get 20% of something, you must divide it by 5 since 20*5=100
Anyway, since Jada's dog is 20% of it's adult weight, but currently weighing 9kg, we must multiply that by 5
9*5=45kg
Jada's dog's adult weight is 45kg
Hope it helped

6 0

3 years ago

Mileage tests are conducted for a particular model of automobile. If a 98% confidence interval with a margin of error of 1 mile

kipiarov [429]

Answer: 37

Step-by-step explanation:

As per given description in the question, we have

Population standard deviation : $\sigma=2.6\text{ miles per gallon}$

Critical value for 98% confidence interval = $z_{\alpha/2}=2.33$

Margin of error : E= 1 mile per gallon

Formula we use to find the sample size :

$n=(\dfrac{z_{\alpha/2}\cdot \sigma}{E})^2$

i.e. $n=(\dfrac{(2.33)\cdot(2.6)}{1})^2$

$\Rightarrow\ n=36.699364\approx37$

Therefore , the number of automobiles should be used in the test =37

4 0

3 years ago

A person can travle 22 and a half miles in one third hour.what is his average speed in miles per hour

Taya2010 [7]

66 miles per hour is the average

5 0

4 years ago

Before training for the obstacle course, Helena bought a new pair of athletic shoes. She placed the shoes on the floor next to e

OLEGan [10]

The comparison of shoes placed on the floor by Helena next to each other change from reflection to translation.

<h3>What do you mean by reflection?</h3>

The reflection of a plane or shape is flipping the original figure with respect to a reference line.

The rule of reflection are given below,

Reflection about x-axis (x,y)-->(x,-y)
Reflection about y-axis (x,y)-->(-x,y)

Before training for the obstacle course, Helena bought a new pair of athletic shoes.

She placed the shoes on the floor next to each other and noticed that the right shoe looked just like a reflection of the left shoe.
This is because, the separating line works as the symmetry line between both the shoes.

Now she had accidentally purchased two left shoes. Now, if she puts a left shoe to another left shoe, then it looks like the translated image of the first shoe.

Hence, the comparison of shoes placed on the floor by Helena next to each other change from reflection to translation.

Learn more about the reflection here;

brainly.com/question/1908648

#SPJ1

4 0

2 years ago

What is the quotient (x3 – 3x2 + 3x – 2) ÷ (x2 – x + 1)?

timofeeve [1]

We need to find the quotient of the given division problem.

$\frac{x^{3}-3x^{2}+3x-2}{x^{2}-x+1}$