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2 years ago

11

A math teacher gave her class two tests. Twenty-five percent of the class passed both tests and 42 percent of the class passed o

nly the first test. What percent of the students who passed the first test also passed the second?

1 answer:

Norma-Jean [14]2 years ago

4 0

25% of the class who passed the first test also passed the second

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Is this equation standard form of an ellipse or circle?

Usimov [2.4K]

The standard form equation for a circle is

$(h-x)^2+(k-y)^2=r^2$

where (h, k) is the center and r is the radius.

The standard form equation for an ellipse is

$\frac{(x-h)^2}{a^2}} + \frac{(y-k)^2}{b^2} = 1$

(center h, k and major and minor axes a and b)

This equation is standard form for neither, but might be general form for one.

$-3x^2-3y^2-12x-12y+24=0 \\ -3(x^2+y^2+4x+4y)=-24 \\ x^2+4x+y^2+4y=8\ (complete\ the\ squares)\\ (x^2+4x+4)+(y^2+4y+4)=8+4+4\\ (x+2)^2+(y+2)^2=16 \\ Circle\ with\ radius\ 4\ and\ center\ (2,\ 2)$

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2 years ago

-4x 25 = 13 solve for x

sammy [17]

- 4x + 25 = 13
4x = 12
x = 3

3 0

2 years ago

Question 3 Solve for m. 4 over 3 m equals 4

Lorico [155]

Answer:

$m = 3$

Step-by-step explanation:

$\frac{4}{3} m = 4 \\ divide \: both \: sides \: by \: \frac{4}{3} \\ \\ m = 3$

3 0

2 years ago

Https://www.hmhco.com/one/assessment/#/formativeLive Assessment/

GuDViN [60]

A. equation: y = -3x - 2

B. y-intercept: -2

<em><u>Solution:</u></em>

Given that,

<em><u>Write the equation 12x = - 4y - 8 in slope-intercept form</u></em>

The slope intercept form is given as:

$y = mx + c$

Where,

m is the slope and "c" is the y intercept

From given

$12x = -4y - 8\\\\Rewrite\\\\-4y-8 = 12x\\\\Move\ the\ constant\ to\ right\ side\\\\-4y = 12x + 8\\\\y = \frac{12x}{-4} + \frac{8}{-4}\\\\y = -3x -2$

Thus the slope intercept form is found

Comparing with y = mx + c ,

c = -2

Thus the y intercept is -2

3 0

2 years ago

The parabola y=x^2 is reflected across the x axis and then scaled vertically by a factor of 1/8.

tekilochka [14]

ANSWER

The new equation is:

$y = - \frac{1}{8} {x}^{2}$

EXPLANATION

The given parabola has equation,

$y = {x}^{2}$

This is the parent function.

When we reflect this parabola in the x-axis and then scaled vertically by a factor of 1/8.

The new equation becomes:

$y = - \frac{1}{8} {x}^{2}$

3 0

2 years ago