Answer:
b is the variable.
Letters in math are called variables
Step-by-step explanation:
Answer:
0
Step-by-step explanation:
-3x +4y = 20 Multiply this equation by 2.
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6x + 3y = 15
-6x + 8y = 40 Notice that -3 becomes -6, 4 becomes 8 and 20 becomes 40
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11y = 55 The xs have disappeared. Divide by 11
y = 55/11
y = 5
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6x + 3y = 15
6x + 3*5 = 15
6x + 15 = 15
6x = 15 - 15
6x = 0
6x/6 = 0/6
x =0
Answer:
( -2.5, -2 )
Step-by-step explanation:
use the formula:
M= (x1 + x2/2,y1 + y2/2)
=(<u>-</u><u>3</u><u>+</u><u>-</u><u>2</u>, <u>4</u><u>+</u><u>-</u><u>8</u><u>)</u>
2. 2
=(<u>-</u><u>5</u> ,<u> </u><u>-</u><u>4</u>)
2. 2
=(-2.5 , -2)
Answer:
a) 3.39 cm b) 21.29 cm
Step-by-step explanation:
ok so the area of a circle is r^2.
if the area is 36 cm^2 we can divide it by 3.14, which is pi (). that gives us 11.46. now we find the approximate square root of this.
this is approximately equal to 3.39. the radius is about 3.39cm.
now that we know the radius, we can easily find the circumference. the formula for this is d. the diameter is just the radius times 2. (3.39)(2)
we plug the numbers into the formula: 3.14(6.78)=21.29 cm =d
You can factor spread these apart using Rupart's rule of deconstruction.
(8 + x)(8 + y)(x + 7)
So each monomial is obviously to the 8th degree. If not in the answers, it would HAVE to be a factor.