Using linear combination method what is the solution to the system of linear equations 7X -2Y = -20 and 9X + 4Y = -6

Mathematics

1 answer:

Yakvenalex [24]3 years ago

8 0

Answer:

(x,y ) = ( - 2,3)

Step-by-step explanation:

given the 2 equations

7x - 2y = - 20 (1)

9x + 4y = -6 (2)

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Can someone help me with this question with a explanation?

allsm [11]

No, I do not agree with Jada.

Quad A has 3, 6, 6, 9
Quad B is a scale of A with shortest length being 2

A scale is basically a fraction or a ratio. The scale of Quad A to B is 3/2 since Quad A's shortest length is 3.

Using the scale factor of 3/2, we can determine the rest of Quad B's demensions through cross multiplication.

3/2 = 6/4
3/2 = 9/6

Quad B's demensions are 2, 4, 4, 6.

5 0

3 years ago

In parallelogram ABCD, DB =28 cm. AN and CM are perpendicular to BD. AN = CM =10 cm. Find the area of the parallelogram.

tatiyna

Answer: 280 cm

Step-by-step explanation:

The base of each of the congruent triangles ABD and CBD is BD= 28 cm. The height of each is the perpendicular 10cm.

A=(2)(bh/2) works out to A= bh since the 2/2 cancel

So 10cm × 28cm = 280cm²

4 0

3 years ago

Graph the piecewise function.

dmitriy555 [2]

I think the graph below is correct.

4 0

3 years ago

How would you graph the solution set of x - 6 < -3?

mezya [45]

Answer:

Draw an open circle on 3 and shade to the left.

Step-by-step explanation:

Given:

The inequality given is:

$x-6$

In order to solve for 'x', we add 6 on both sides of the inequality. This gives,

$x-6+6$

Therefore, the solution is 'x' less than 3.

So, 'x' includes all the values that are less than 3 and excluding 3 as the inequality sign is less than.

So, on a number line, the values that are less than 3 are to the left of 3. So, we shade to the left. Also, 3 is excluded from the solution. So, we use an open circle as shown below.

So, the first option is the correct option.