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Elena-2011 [213]
2 years ago
12

Tìm x a) (x+3)²+(x-2)²=2x²

Mathematics
1 answer:
natta225 [31]2 years ago
3 0
The answer is 7 because x+3 is 10. Hope this helped
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This is converting to polar form, I need help and the answer too.
Mila [183]

Answer:

2 cis (7/6 pi)

Step-by-step explanation:

r = sqrt( a^2 + b^2)

r = sqrt (-sqrt(3) )^2 + (-1)^2)

   = sqrt(3 +1)

    = sqrt(4)

    = 2

theta  = arctan (b/a)

theta = arctan (-1/-sqrt(3))

theta = 30

but this is in the third quardrant  -a and -b

so add 180

theta = 210 degrees

convert this to radians

210 * pi/180 = 210/180 * pi = 21/18 * pi = 7/6 * pi


r cis (theta)

2 cis (7/6 pi)

7 0
3 years ago
In a right triangle, the measure of one acute angle is twice the sum of the measure of the other acute angle and 30. Find the me
Alja [10]

Answer:

Step-by-step explanation:

if we have a right triangle,

one angle=90

180-90=90

let x be one angle, and y another angle

the other is 2x+30

x+2x+30=90

3x=60

x=20

y=70

5 0
3 years ago
Read 2 more answers
Propane has a heat energy of 2,470 BTU/ft cubed. How much energy can a propane tank with a volume of 43.7 ft cubed produce?
professor190 [17]

Answer: 107939\ BTU

Step-by-step explanation:

Given

Propane produced heat energy of 2470\ BTU/ft^3

The volume of the tank is 43.7\ ft^3

The energy produced by this propane tank is

\Rightarrow 2470\times 43.7=107939\ BTU

4 0
2 years ago
I need help please and thank you . I am try to pass this.
Levart [38]

Answer:

11 ≤ n

Explanation:

\frac{66}{6}  = 11

More than indicates the minimum value, so you use the greater than or equal to.

The above answer is written in reverse, which the exact same result.

I am joyous to assist you anytime.

8 0
3 years ago
If you have $45 and they take 2.1% of it how much do you have left ?
IRINA_888 [86]
First you need to make a multiplier for 100-2.1%, to do this you minus the values and divide it by 100:
100-2.1 = 97.9
97.9/100 = 0.979

Then you multiply all the questions by it:
$45 * 0.979 = $44.055
$765 * 0.979 = $748.935
$1300 * 0.979 = $1272.7

Hope this helps! :)
3 0
3 years ago
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