All categories

3 years ago

Solve the following system of equations algebraically: x2 + y2 = 20 2y = x

Mathematics

1 answer:

MaRussiya [10]3 years ago

4 0

Answer:

x = 5

Step-by-step explanation:

x2 + y2 = 20

xy = 20 ÷ 2 ÷2

= 10 ÷ 2

x = 5

i dont know whether this is right

but hope it helps n it works

You might be interested in

Normally I would do a 100 point give away but I'm feeling sad today D: Please help cheer me up. I might think about doing a 100

ch4aika [34]

Answer:

um hi I don't know what to say so I put a picture of my dog

7 0

3 years ago

Read 2 more answers

Suppose a baseball is thrown vertically upward from the ground with an initial velocity of Subscript[v, 0] ft/s. Its height abov

Zina [86]

Answer:

90.5

Step-by-step explanation:

Velocity is a time-derivative of displacement or the height, in this case.

$s(t)=-16t^2+v_0t$

$v(t) = -32t+v_0$

At maximum height, the velocity is 0 and the height is 128.

Substitute these values into both equations above,

$0 = -32t+v_0$

$t=\dfrac{v_0}{32}$

From the first equation,

$128 = -16t^2 + v_0t$

Substitute for $t$ .

$128 = -16(\dfrac{v_0}{32})^2 + v_0\times\dfrac{v_0}{32}$

$128 = -v_0^2/64 + v_0^2/32$

$128=\dfrac{v_0^2}{64}$

$v_0^2=8192$

$v_0=64\sqrt{2}=90.5$

5 0

3 years ago

Factor out the GCF of the polynomial down below:

Yuliya22 [10]

Answer: 2x^3

Reasoning: balance out the numbers

Mark brainliest please

7 0

2 years ago

If AGHJ - ALMK, with a scale factor of 5:6, find the perimeter of AGHJ.

Sergeeva-Olga [200]

Answer:

I am pretty sure the answer is 10: 12 have a great day.

Step-by-step explanation:

7 0

3 years ago

Help with solving for the variable in math problem: -3(3x)^2 + 3 = -6

lana66690 [7]

Answer

x = 1/√3 and x = -1/√3

or in decimals x = + 0.577350269 and

= - 0.577350269

Explanation

-3(3x)² + 3 = -6

-3×9x² + 3 = -6

-27x² = -6-3

-27x² = -9

x² =-9/(-27)

= 9/27

x = +√(9/27)

x = 3/√27

= 3/√9×3

= 3/3√3

= 1/√3

or in decimals x = 0.577350269

Also x = -√(9/27)

x = +√(9/27)

x = -3/√27

= -3/√9×3

= -3/3√3

= -1/√3

or in decimals x = -0.577350269

6 0

3 years ago

Read 2 more answers