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laiz [17]
3 years ago
7

If you were to solve the following system by substitution, what would be the best variable to solve for and from what equation?.

. 2x+8y=12. 3x-8y=11. . A. y, in the first equation. B. x, in the second equation. C.x, in the first equation. D. y, in the second equation
Mathematics
2 answers:
Ludmilka [50]3 years ago
5 0

Answer:

the answer is c

Step-by-step explanation:

jeka57 [31]3 years ago
4 0
The answer is C. x, in the first equation. The first equation is easiest to simplify since other than 8y is their common variable, equation 1 is also divisible by 2 so it will not contain any fractions which would be harder to simplify.

Rearranging the first equation, the result would be:

2x + 8y = 12
8y = 12-2x----equation 1

This equation can then be directly substituted to the second equation since the value of 8y is given.

Substitute the right hand of the first equation of 8y which is 12-2x to the second equation. The result would be:

3x-(12-2x) = 11
3x-12 + 2x =11
5x = 11+12
5x = 23
x= 23/5
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(5x²+2) - (-4x²+7)+(-3x²-5)
svp [43]

Answer:

6x^2   -10

Step-by-step explanation:

(5x²+2) - (-4x²+7)+(-3x²-5)

Distribute the minus sign

(5x²+2) +4x²-7 +(-3x²-5)

Combine like terms

5x²+4x²-3x²  +2-7-5

6x^2              -10

6 0
3 years ago
URGENT! PLEASE ANSWER IF YOU ACTUALLY KNOW THE ANSWER!
Pie

Using translation concepts, the coordinates that will best represent point E′ are given by:

D. (11, 1).

<h3>What is a translation?</h3>

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.

In this problem, the rule to find the image of a point (x,y) is given by:

(x, y) → (x + 8, y + 5).

Then, the rule to find the image E' of point E(3,-4) is given by:

(3,4 -> (3 + 8, -4 + 5) = (11,1).

Hence option D is correct.

More can be learned about translation concepts at brainly.com/question/4521517

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3 0
1 year ago
A magazine publisher mails a survey to every subscriber asking about the quality of its subscription service.
scoray [572]
A Statistic.

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3 0
3 years ago
For a dilation with a scale factor less than 1, how do the angles and side lengths of the preimage relate to the angles and side
kakasveta [241]

Answer: option A

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Use two unit multipliers to convert 628 kilometers to centimeters
irina [24]

Using two unit multiplier 628 km is equal to 62800000 cm

<u>Solution:</u>

628 kilometer to centimeter

We will go from kilometers to meters to centimeters.

Start by putting 628 km over 1:

\frac{628 km}{1}

We want to get rid of km and bring in m.

We know that 1000 m = 1 km.

Since km is in the numerator, we will make the  first unit multiplier by putting 1 km in the  denominator and 1000 m in the numerator, so the  km will cancel. So we multiply by the unit multiplier,

\frac{628 km}{1} \times \frac{1000m}{1km}

Now the km's will cancel:

\frac{628}{1} \times \frac{1000m}{1}

Now we want to get rid of m and bring in cm.

We know that 100 cm = 1 m.

Since meter is in the numerator, we will make the  first unit multiplier by putting 1 meter in the  denominator and 100 cm in the numerator, so the  meter's will cancel. So we multiply by the unit  multiplier

\frac{100cm}{1m}

\frac{628}{1} \times \frac{1000m}{1} \times \frac{100cm}{1m}

We cancel the m's and we end up with:

628 \times 1000 \times 100 cm

= 62800000 cm

Thus 628 km is equal to 62800000 cm

5 0
3 years ago
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