4 years ago

PLease help ill give brainliest

Mathematics

1 answer:

Trava [24]4 years ago

8 0

$d \: = \frac{m}{v} \\ m = dv \\ m = 15 \times 10 \\ m = 150$
the answer is A

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Write the point-slope form of the line that has a slope of -7 and passes through the point (10,4).

DaniilM [7]

Answer:

y=10/4-7

Step-by-step explanation:

3 0

3 years ago

X^2 + 4y^2 =100; 4y - x^2 = -20

deff fn [24]

$x^2+4y^2=100\implies x^2=100-4y^2$
$\implies 4y-(100-4y^2)=-20$
$\implies 4y^2+4y-80=0$
$\implies y^2+y-20=0$
$\implies (y-4)(y+5)=0$
$\implies y=4,y=-5$

When $y=4$ , you have

$4(4)-x^2=-20\implies x^2=36\implies x=\pm6$

When $y=-5$ ,

$4(-5)-x^2=-20\implies x^2=0\implies x=0$

So there are three solutions, $(x,y)\in\{(6,4),(-6,4),(0,-5)\}$ .