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3 years ago

HELP ASAP TIMED QUIZ!!! MANY THANKS PICTURE BELOW :}

Mathematics

1 answer:

slavikrds [6]3 years ago

7 0

Answer:

Step-by-step explanation:

x2+3x=6

Step 1: Subtract 6 from both sides.

x2+3x−6=6−6

x2+3x−6=0

For this equation: a=1, b=3, c=-6

1x2+3x+−6=0

Step 2: Use quadratic formula with a=1, b=3, c=-6.

−b±√b2−4ac

−(3)±√(3)2−4(1)(−6)

2(1)

−3±√33

−3

√33 or x=

−3

−1

√33

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Brian bought 4 CDs that were each the same price. Including sales tax, he paid a total of $60.80 . Of that total, $3.60 was tax.

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4 years ago

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3 years ago

Q8<br> The midpoint of GH is M (2,2). One endpoint is H (1,9). Find the coordinates of endpoint G.

Amanda [17]

Answer:

(3,-5)

Step-by-step explanation:

Given

$M = (2,2)$

$H = (1,9)$

Required

Determine G

This is calculated using the following midpoint formula;

$M(x,y) = (\frac{x_1 + x_2}{2},\frac{y_1 + y_2}{2})$

Where

$(x,y) = (2,2)$ and $(x_1,y_1) = (1,9)$

Substitute these values in the formula above

$(2,2) = (\frac{1 + x_2}{2},\frac{9 + y_2}{2})$

Solving for $x_2$

$2 =\frac{1 + x_2}{2}$

Multiply both sides by 2

$2 * 2 = 1 + x_2$

$4 = 1 + x_2$

$x_2 = 4 - 1$

$x_2 = 3$

Solving for $y_2$

$2 = \frac{9 + y_2}{2}$

Multiply both sides by 2

$2 * 2 = 9 + y_2$

$4 = 9 + y_2$

$y_2 = 4 - 9$

$y_2= -5$

Hence, the coordinates of G is $(3,-5)$

4 0

3 years ago