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ELEN [110]
4 years ago
7

Is (2,2) a solution to x+y=4 and 5x+5y=20?

Mathematics
1 answer:
telo118 [61]4 years ago
7 0

Answer:

yes

Step-by-step explanation:

(2,2)

x=2 y=2

x+y=4

2+2=4

4=4

5x+5y=20

5(2)+5(2)=20

10+10=20

20=20

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What is the domain of the function y= square root of x +4
Gala2k [10]

Answer:

[- 4, ∞ )

Step-by-step explanation:

the expression inside the radical must be greater than or equal to zero

x +4 ≥ 0 ⇔ x ≥ - 4

domain: x ∈ [- 4, ∞ )


3 0
4 years ago
In the base-ten number system, ten digits {0, 1, 2, 3, 4, 5, 7, 8, 9) are used for number
SVETLANKA909090 [29]

Answer:

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6 0
2 years ago
What are the coordinates of the orthocenter of △JKL with vertices at J(−4, −1) , K(−4, 8) , and L(2, 8) ?
Sati [7]

<u>Answer-</u>

<em>The coordinates of the orthocenter of △JKL is (-4, 8)</em>

<u>Solution-</u>

The orthocenter is the point where all three altitudes of the triangle intersect. An altitude is a line which passes through a vertex of the triangle and is perpendicular to the opposite side.

For a right angle triangle, the vertex at the right angle is the orthocentre of the triangle.

Here we are given the three vertices of the triangle are  J(-4,-1), K(-4,8) and L(2,8)

If the triangle JKL satisfies Pythagoras Theorem, then triangle JKL will be a right angle triangle.

Applying distance formula we get,

JK^2= (-4+4)^2+ (8+1)^2=0+81=81\\\\KL^2= (-4-2)^2+ (8-8)^2=36+0=36\\\\JL^2= (-4-2)^2+(8+1)^2=36+81=117

As,

\Rightarrow 117=81+36

\Rightarrow JL^2=JK^2+KL^2

\Rightarrow \text{JKL is a right angle triangle}

\Rightarrow \angle K=90^{\circ}

Therefore, the vertex at K (-4, 8) is the orthocentre.

3 0
3 years ago
Please help <br> 2y+x=-15 <br> y=2x
Eva8 [605]

Answer: x = -3

Step-by-step explanation:

2y + x = -15

y = 2x

2y = 2(2x) = 4x

4x + x = -15

5x = -15

x = -3

5 0
3 years ago
Ichiro took out a subsidized student loan of $13,000 at a 3.6% APR
german

Answer:

The amount of money he owes when he begins making payments:

A = 13000 x ( 1 + rate/12)^month

  = 13000 x (1 + (3.6/100)/12)^15

  = 13597.45 dollar

Hope this helps!

:)

8 0
3 years ago
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