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3 years ago

Umm ... Plss Helpp....

Mathematics

1 answer:

svet-max [94.6K]3 years ago

6 0

Answer:

Convert into kinetic energy

Step-by-step explanation:

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Which graph represents y > 2x - 1?

GrogVix [38]

I believe b because it would be dotted and has a slope of 2 or 2/1

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3 years ago

SOMEONE PLEASE HELP

Wewaii [24]

C and c because there is only 2 people

4 0

3 years ago

Please Help!!! Due: Monday On Ellipses - Pre Calc

eduard

25. Step-by-step explanation:

$\text{The general form of an ellipse is:}\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2}=1\\\\\bullet \text{(h, k) is the Center}\\\bullet \text{a is the radius of x}\\\bullet \text{b is the radius of y}\\\bullet \text{the largest value between a and b is the major}\\\bullet \text{the smallest value between a and b is the minor}\\\bullet \text{the vertices are the (h, k) value plus the major (a or b) value}\\\bullet \text{the co-vertices are the (h, k) value plus the minor (a or b) value}\\\bullet \text{Length is the diameter}=2r\\$

$\dfrac{x^2}{16}+\dfrac{y^2}{25}=1\quad \text{can be rewritten as}\ \dfrac{(x-0)^2}{4^2}+\dfrac{(y-0)^2}{5^2}=1\\\\\bullet (h, k)=(0,0)\\\bullet a=4\\\bullet b=5\\\bullet \text{b is the largest value so: b is the major and a is the minor}\\\bullet \text{Vertices are }(0, 0+5)\ and\ (0, 0-5)\implies (0, 5)\ and\ (0, -5)\\\bullet \text{Co-vertices are }(0+4, 0)\ and\ (0-4, 0)\implies (4,0)\ and\ (-4,0)\\\bullet \text{Length of major is }2b:2(5)=10\\\bullet \text{Length of minor is }2a:2(4)=8$

To find the foci, first we must find the length of the foci using the formula:

$(r_{major})^2-(r_{minor})^2=c^2$

Then add the c-value to the h (or k)-value that represents the major.

b² - a² = c²

25 - 16 = c²

9 = c²

±3 = c

The center is (0, 0) and the major is the y-value so the foci is:

(0, 0+3) and (0, 0-3) ⇒ (0, 3) and (0, -3)

26. Answers

Follow the same steps as #25:

Center: (0, 0)

Vertices (7, 0) and (-7, 0)

Co-vertices: (0, 3) and (0, -3)

foci: (2√10, 0) and (-2√10, 0)

length of major: 14

length of minor: 6

5 0

3 years ago

The answer of this question

dolphi86 [110]

Answer:

i think it is c

Step-by-step explanation:

not 100% sure tho

4 0

4 years ago

The line passing through (4, a) and (8, 1) has gradient 0.75. Work out the value of a.

olga55 [171]

Answer:

a = - 2

Step-by-step explanation:

calculate the slope of the 2 given points and equate to 0.75

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (4, a ) and (x₂, y₂ ) = (8, 1 )

m = $\frac{1-a}{8-4}$ = $\frac{1-a}{4}$

then equating

$\frac{1-a}{4}$ = 0.75 ( multiply both sides by 4 to clear the fraction )

1 - a = 3 ( subtract 1 from both sides )

- a = 2 ( multiply both sides by - 1 )

a = - 2

3 0

2 years ago