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3 years ago

Heather has to solve this system of equations using elimination. What should be her first step?

2 answers:

8 0

The elimination method is used for solving linear systems of equations.It is way of solving a linear system of equations.In the elimination method we either add or subtract the equations to get an equation in one variable.The main concept behind elimination method is to create terms with opposite coefficients because they cancel each other when added.

When the coefficients of one variable are opposites you add the equations to eliminate a variable and when the coefficients of one variable are equal you subtract the equations to eliminate a variable.

When Heather has to solve this system of equations using elimination her first step will be to make the coefficients of x or y the same so that one of the variable is eliminated on addition or subtraction of the equations.

charle [14.2K]3 years ago

6 0

I don’t know what the equation is but when using elimination you should cancel out opposite numbers such as 4x and negative 4x

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A train leaves Zurich at 2240 and arrives in Paris at 0732. work out the time taken

Alisiya [41]

The time taken to reach train from Zurich to Paris is 8 hours 52 minutes.

Step-by-step explanation:

The given is,

Train leaves Zurich at 22:40

Train arrives Paris at 07:32

Step:1

Time taken to reach from zurich to paris,

= Train leaves at Zurich - Train arrives at Paris

= 22:40 - 07:32

= 8.52 hours

Step:2

Time taken by train to reach from zurich to paris in minutes,

= 8.52 hours

= 4831 minutes 12 secs

Result:

The time taken to reach train from Zurich to Paris is 8 hours 52 minutes, if a train leaves Zurich at 2240 and arrives in Paris at 0732.

4 0

3 years ago

Whats the y intercept of y=4x -3

AleksAgata [21]

Answer:

-3

Step-by-step explanation:

the y intercept is the number that does not have a variable behind it (3)

the slope is the number that does have a variable behind it (4)

6 0

2 years ago

Read 2 more answers

How do i find the answer of this math question or problem f(x) = 4x − 9?

Mademuasel [1]

Answer:

x = 9/4

Step-by-step explanation:

f(x) = 4x - 9

(first substitute f(x) with 0)

0 = 4× - 9

(Move four)

-4x = -9

=> x = -9/-4

= 9/4

6 0

2 years ago

√3=1.732 find the value of√75+1/2√48-√198

Nookie1986 [14]

Answer:

12.124-3 $\sqrt{22}$

Step-by-step explanation:

$\sqrt{75} = \sqrt{5^{2}*3} \\$

$\sqrt{48}= \sqrt{2^{2}*2^{2}*3} \\$

$\sqrt{198} =\sqrt{3^{2}*2*11} \\$

$\sqrt{75} +\frac{1}{2} *\sqrt{48} - \sqrt{198} \\\\\sqrt{5^{2}*3} +\frac{1}{2} *\sqrt{2^{2}*2^{2}*3} - \sqrt{3^{2}*2*11} \\\\5\sqrt{3} +\frac{1}{2} *4 \sqrt{3} - 3 \sqrt{2*11} \\\\5\sqrt{3} +2 \sqrt{3} - 3 \sqrt{22} \\\\5*1.732 +2*1.732 - 3 \sqrt{22} \\\\8.66 + 3.464 - 3 \sqrt{22}\\\\12.124- 3 \sqrt{22}$

4 0

2 years ago

URGENT HELPP!!!

Aleonysh [2.5K]

<span>All three sides of triangle X'Y'Z' must be parallel to the corresponding sides in triangle XYZ and the corresponding angles are congruent .

The dilated triangle will be similar to the original triangle, which means all angles will be the same.

</span><span>The sides of the two triangles will also be parallel. You can test this by observing the slopes:
Line XY has a slope of 2/3, moving from -4,2 and passing through -1,4.
Line X'Y' has the same slope, moving from (-6,3) to (-3,5)

You can see that this is the case for all corresponding sides' slopes. </span>

3 0

3 years ago

Read 2 more answers