2x-4y=2 -2x+3y=0 elimination
Answers
2x-4y=2
-2x+3y=0
-------------------- (+)
3y-4y=2
-y=2 /*(-1)
y=-2
2x-4y=2
2x-4*(-2)=2
2x+8=2 /-8
2x=-6
x=-3
Related Questions
The diagram shows a solid which is half of a cone. Calculate the total surface area of the solid. a. ( 48 + 48 ) b. ( 48 + 15 ) c. ( 48 + 30 ) d. ( 24 + 15 )
How do I find this answer 20=4x
Describe how the equation y equal left parenthesis x minus 2 right parenthesis to the power of 2 plus 5 transforms the graph of a basic parabola y equal x to the power of 2 .
Factor the expression y2+6y-16
A. 49x2 + 36
B. 49x2 - 84x + 36
C. 7x2 - 84x + 36
D. 7x2 + 36
Answers
(7x - 6)² becomes
(7x - 6)(7x - 6)
Next, we follow FOIL
First (The first term in the set 1 multiplied by the first term in set 2)
Outer (The first term in set 1 multiplied by the second term in set 2)
Inner (The second term in set 1 multiplied by the first term in set 2)
Last (The second term in set 1 multiplied by the second term in set 2)
F 7x x 7x = 49x²
O 7x x -6 = -42x
I -6 x 7x = -42x
L -6 x -6 = 36
Now, we add together all the terms
49x² + -42x + -42x +36
Adding a negative is the same as subtracting
49x² - 42x - 42x + 36
Finally, simplify (add together the like terms)
49x² -84x + 36
Answer:
Option B: 49x² -84x + 36
Step-by-step explanation:
Answers
whoever answers right in the next five minutes get the brainiest thing
Answers
∠A = 106.3°, ∠B = 20.6°, ∠C = 53.1°
Step-by-step explanation:
In a ΔABC, the sides opposite to the angle A is a, angle B is b, and angle C is c. a = 60 , b= 22, c = 50
We can find any one angle by cosine rule,
a² = b² + c² - 2 bc cos (A)
60² = 22² + 50² - 2(22)(50) cos A
3600 = 484 + 2500 - 2200 cos A
3600 = 2984 - 2200 cos A
3600 - 2984 = -2200 cos A
616 = -2200 cos A
cos A = 616/ -2200 = -0.28
A = cos⁻¹ (-0.28) = 106.3°
Now we can use sine rule to find angle B as,
sin A/ a = sin B / b
sin 106.3° / 60 = sin B / 22
sin B = 22 × sin 106.3° / 60
B = sin⁻¹ (22 × sin 106.3° / 60 ) = 20.6°
As we know the sum of angles in a triangle is 180°.
∠A + ∠B + ∠C = 180°
106.3° + 20.6° + ∠C = 180°
126.9° + ∠C = 180°
∠C = 180° - 126.9° = 53.1°
Answers
L = x
L = 2 W
W = L/2 = x/2
A = x * x / 2
A = x² / 2
Answer:
The area of a rectangle is x²/2.
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=6(1+1+1+1+1+1+1)
=6*1+6*1+6*1+6*1+6*1+6*1+6*1
=6+6+6+6+6+6+6
=42
the answer is 42 because there is no other numbers in parentheses
Answers
Answer:
Perimeter: 2l+2w
Area: lw
Step-by-step explanation:
Let l=length, and w=width
Answer:
For Perimeter its 2times length + 2times width
and for Area its: length times width
Hope this helps :)