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anyanavicka [17]

4 years ago

13

If a linear system has no solution what happens when you try to solve the system by adding or subtracting

1 answer:

fgiga [73]4 years ago

7 0

In the addition/subtraction method, the two equations in the system are added or subtracted to create a new equation with only one variable. In order for the new equation to have only one variable, the other variable must cancel out. In other words, we must first perform operations on each equation until one term has an equal and opposite coefficient as the corresponding term in the other equation.

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Are these two expressions equivalent? Use the

Rina8888 [55]

Answer:

No, they are not equivalent

Step-by-step explanation:

8x + 3(x + y)

8x + 3x + 3y

11x + 3y

7x + 7y + 4x + 4y

11x + 11y

They are not equivalent because in one of the equations, the like terms add up to 11y which is different from the other equation which adds up to 3y.

I hope this helps.

8 0

3 years ago

Plzz help <br><br>find value of following : 2sin75°.cos15°

polet [3.4K]

Answer:

$\frac{2+\sqrt{3} }{2}$

Step-by-step explanation:

Using the product to sum formula

sinxcosy = $\frac{1}{2}$ [ sin(x + y) + sin(x - y) ] , then

2sinxcosy = sin(x + y) + sin(x - y)

Given

2sin75°cos15° ← with x = 75 and y = 15 , then

= sin(75 + 15) + sin(75 - 15)

= sin90° + sin60°

= 1 + $\frac{\sqrt{3} }{2}$

= $\frac{2+\sqrt{3} }{2}$

6 0

3 years ago

The monthly salary of Mr. Sachdev gets increased by 5%, thereby his salary becomes Rs. 15,120 per annum, His earlier monthly sal

Elan Coil [88]

1. x = 15120/12 = 1260 (monthly salary)
2. 1200 x 0.05 = 60 (raise)
Check: 1200+60=1260

6 0

3 years ago

A student borrows $12,000 at a simple interest rate of 4.5% for 5 years. How much interest is ones at the end of 5 years, and wh

Step2247 [10]

Answer:

$12,000(1+\frac{4.5}{100}*5)=12,000(1.225)=\$14,700$

Step-by-step explanation:

Simple interest is where interest is only accumulated on the principle, so at 4.5% for 5 years, 22.5% is added to the principal.

5 0

3 years ago

I don’t get this question. Please help me answer is.

Svetlanka [38]

Answer:

5x ^ 2

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers