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nikitadnepr [17]

3 years ago

15

John is gliding along on his scooter at a speed of 2.8 m/s when

1 answer:

user100 [1]3 years ago

3 0

Answer:

18.67 m/s²

Step-by-step explanation:

a = ∆v/ t

a= v - u/t

a = 2.8 - 0 / 0.15

a = 2.8 / 0.15

a = 18.67 m/s²

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X squared+ y squared = 2 y = 2x squared – 3 Which of the following describes the system?

cluponka [151]

Answer:

$x=-1,1,-\sqrt{\frac{7}{4} },\sqrt{\frac{7}{4}}$ and $y=-1,\frac{1}{2}$

The ordered pair solutions are $(-\sqrt{\frac{7}{4}},0.5)$ , $(\sqrt{\frac{7}{4}},0.5)$ , $(-1,-1)$ , and $(1,-1)$ .

Step-by-step explanation:

I'm assuming the system is $\left \{ {x^2+y^2=2} \atop {y=2x^2-3}} \right.$ :

$x^2+y^2=2$

$x^2+(2x^2-3)^2=2$

$x^2+(4x^4-12x^2+9)=2$

$x^2+4x^4-12x^2+9=2$

$4x^4-11x^2+9=2$

$4x^4-11x^2+7=0$

$x^4-11x^2+28=0$

$(x^2-7)(x^2-4)=0$

$(4x^2-7)(x^2-1)=0$

$4x^2-7=0$

$4x^2=7$

$x^2=\frac{7}{4}$

$x=\pm\sqrt{\frac{7}{4}}$

$x^2-1=0$

$x^2=1$

$x=\pm1$

$y=2x^2-3$

$y=2(\pm\sqrt{\frac{7}{4}})^2-3$

$y=2({\frac{7}{4}})-3$

$y=\frac{7}{2}-3$

$y=\frac{1}{2}$

$y=2x^2-3$

$y=2(\pm1)^2-3$

$y=2(1)-3$

$y=2-3$

$y=-1$

Therefore, $x=-1,1,-\sqrt{\frac{7}{4} },\sqrt{\frac{7}{4}}$ and $y=-1,\frac{1}{2}$

The ordered pair solutions are $(-\sqrt{\frac{7}{4}},0.5)$ , $(\sqrt{\frac{7}{4}},0.5)$ , $(-1,-1)$ , and $(1,-1)$ .

4 0

2 years ago

Find X please help me with test corrections due midnight tonight!<br>If HBN is congruent to LYR.

kkurt [141]

Step-by-step explanation:

here's the solution: -

if the given triangles are similar, then their corresponding sides will be in proportion, so

=》

$\frac{x}{14} = \frac{x + 11}{21}$

( by cross multiplication )

=》

$21x = 14x + 154$

=》

$21x - 14x = 154$

=》

$7x = 154$

=》

$x = \frac{154}{7}$

=》

$x = 22$

8 0

2 years ago

Read 2 more answers

Write and expression to match the words “three times the sum of 8 and 4”

JulijaS [17]

Answer:

8+4=12

sooo

3x12=36

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

two boxes are stacked one on top of the other. one box is 5 feet 3 inches tall, and the other is 5 feet 10 inches tall. how high

Yakvenalex [24]

11 feet 1 inch
12inches= 1 foot
5+5=10ft
3+10= 1ft 1inch

4 0

1 year ago

Describe all transformations that occur y= 2(x-7)^2-3

Tom [10]

Horizontal Shift: Right 7

Vertical Shift: Down 3

Reflection about the x-axis: None

Reflection about the y-axis: None

Vertical Compression or Stretch: Stretch

7 0

2 years ago