Exp

Can somebody let me know if this is right or not ??

musickatia [10]

Answer:

B is only equilateral, everything else is correct.

Step-by-step explanation:

4 0

3 years ago

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In what direction is the line containing the points (5, 0) and (5, -9) going?

Radda [10]

Downwards.

Hope it helps!

4 0

3 years ago

If 4x^2 - 100 = 0 then the roots of the equation are

iVinArrow [24]

4x² - 100 = 0
 + 100 + 100
 4x² = 100
 4 4
 x² = 25
 x = +5
4(5)² - 100 = 0
4(25) - 100 = 0
100 - 100 = 0
 0 = 0

4(-5)² - 100 = 0
4(25) - 100 = 0
 100 - 100 = 0
 0 = 0

The roots of the equation is positive or negative 5.

8 0

3 years ago

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A fair coin is tossed five times. What is the probability of getting H,H,T,H,H in that order?

Lubov Fominskaja [6]

Answer:

Step-by-step explanation:

There are 32 possible outcomes when you toss a fair coin 5 times. You will always get one of the 32 outcomes. For example to could get 3 heads followed by 2 tails.

Each toss has only 2 outcomes: heads or tails. The way you get 32 is by

2 * 2 * 2 * 2 * 2 = 32.

You must get 1 of the 32 possible outcomes.

1 of them is the one you suggested

1/32 = 0.03125 is the probability that you want.

3 0

3 years ago

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With slope –1/4, passing through (-4, -1)

True [87]

Answer:

$y = -\frac{1}{4}x - 2$

Step-by-step explanation:

i'm not sure if you're trying to find the equation of the line ?? but i'll assume that's the case and find the slope-intercept form equation of the line.

slope intercept form is $y = mx + b$ , where $m$ is the slope and $b$ is the y-intercept. since the slope is already identified, you can plug in $-\frac{1}{4}$ for $m$ .

$y = mx + b$ ⇒ $y = -\frac{1}{4}x+b$

plug in the $x$ and $y$ values from the coordinate pair that passes through the line, which is (-4, -1). you can start with either $x$ or $y$ , but i'm going to start with $x$ .

first, plug in $-4$ for $x$ .

$y = -\frac{1}{4}x+b$ ⇒ $y = -\frac{1}{4}(-4)+b$

now plug in $-1$ for $y$ .

$y = -\frac{1}{4}(-4)+b$ ⇒ $-1 = -\frac{1}{4}(-4)+b$

after plugging in all of the given values, the equation is now $-1 = -\frac{1}{4}(-4)+b$ , in which you need to solve for $b$ .

now it's time to solve! begin by multiplying $-\frac{1}{4}(-4)$ in order to simplify the right side of the equation.

$-\frac{1}{4}(-4) = 1$

you now have $-1 = 1 + b$ . subtract 1 from both sides of the equation. on the right side, it cancels itself out, leaving you with $b$ . on the left side of the equation, you now have $-1 - 1$ , which equals $-2$ .

therefore $-2 = b$ , or $b = -2$ .

now that you've solved for your $b$ value, plug it into your initial slope-intercept form equation!

$y = -\frac{1}{4}x + b$ ⇒ $y = -\frac{1}{4}x - 2$

if you want to check to make sure that the values are correct, plug (-4, -1) into your completed slope-intercept form equation. as you did in the beginning, plug in $-4$ for $x$ and $-1$ for $y$ .

$y = -\frac{1}{4}x - 2$ ⇒ $-1 = -\frac{1}{4}(-4) - 2$

begin simplifying by multiplying $-\frac{1}{4}(-4)$ .

$-1 = -\frac{1}{4}(-4) - 2$ ⇒ $-1 = 1 - 2$

subtract $1 - 2$ .

$-1 = 1 - 2$ ⇒ $-1 = -1$

since both sides of the equation are equal, that means your $b$ value of $-2$ is correct because it makes the equation true!

aaaand there you go! i hope this helps. have a great day! <3

8 0

3 years ago