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3 years ago

Which is the best first step and explanation for solving this system of equations? 3x+4y=12 3x=2y-8

Mathematics

1 answer:

Greeley [361]3 years ago

6 0

Answer:

Since it is a simultaneous equation,

Using elimination method, Multiply equation 1 by the co efficient of x in equation 2 and multiply equation 2 by the co efficient of x in equation 1.

Step-by-step explanation:

For further explanation , Please contact me through the comment section.

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PLEASE HELP

hram777 [196]

Answer:

answer; a)5√11/11

3 0

3 years ago

Dont get this help asap!

algol [13]

Answer:

Step-by-step explanation:

It is a rectangle, so both sides are equal. Thus 2x+6=5x-9

SOLVE, SUBTRACT 2x

6=3x-9 THEN ADD 9

15=3x THEN divide by 3

5=x

Plug in x to either side 2(5)+6, to get side length of 16

Then area of a rectangle is lengthxwidth=AREA

substitute what you know 16(y)=48

Divide by 16, thus y=3

7 0

2 years ago

A rectangle has a length of 12 yards less than 3 times its width. If the area of the rectangle is 135 square yards, find the len

Aleonysh [2.5K]

Answer:

The length is 15 yards

Step-by-step explanation:

Given

Represent the width with W and length with L: So

$Area = 135yd^2$

$L=3W - 12$

Required

Determine the length of the rectangle:

Area is calculated as thus:

$Area = L * W$

Substitute 3W - 12 for L and 135 for Area

$135= (3W - 12) * W$

$135= 3W^2 - 12W$

Reorder:

$3W^2 - 12W - 135= 0$

Divide through by 3

$W^2 - 4W - 45 = 0$

Expand:

$W^2 - 9W + 5W - 45 = 0$

$W(W - 9) + 5(W - 9) = 0$

$(W + 5)(W-9) = 0$

$W + 5 = 0$ or $W - 9 = 0$

$W = -5$ or $W = 9$

But width can't be negative

So:

$W = 9$

Recall that: $L=3W - 12$

$L = 3 * 9 - 12$

$L = 15$

<em>Hence, the length 15 yards</em>

4 0

3 years ago

You deposit $200 in an account earning 2% interest compounded annually how much will you have any account in 10 years

Naddik [55]

Answer:

$240

Step-by-step explanation:

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3 years ago

How to graph x+y=1 & is it linear

liq [111]

Answer:

Step-by-step explanation:

Plot the points x-intercept and intercept on the graph. Join the two points to get the straight line. This is the graph of the linear equation.

7 0

3 years ago

Which is the best first step and explanation for solving this system of equations? 3x+4y=12 3x=2y-8​

Which is the best first step and explanation for solving this system of equations? 3x+4y=12 3x=2y-8