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3 years ago

Please help promptly

Mathematics

1 answer:

Umnica [9.8K]3 years ago

5 0

Answer:

Answer:

m<2= 35

m<3=55

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Solve y=-3x² + 4.5x – 20<br> Use the Quadratic formula

statuscvo [17]

Answer:

$x=0.75 \pm 2.47067i$

Step-by-step explanation:

Quadratic Formula: $x=\frac{-b \pm \sqrt{b^2-4ac} }{2a}$

√-1 is imaginary number i

Step 1: Define

y = -3x² + 4.5x - 20

a = -3

b = 4.5

c = -20

Step 2: Substitute and Evaluate

$x=\frac{-4.5 \pm \sqrt{4.5^2-4(-3)(-20)} }{2(-3)}$

$x=\frac{-4.5 \pm \sqrt{20.25-240} }{-6}$

$x=\frac{-4.5 \pm \sqrt{-219.75} }{-6}$

$x=\frac{-4.5 \pm \sqrt{219.75}(\sqrt{-1} ) }{-6}$

$x=\frac{-4.5 \pm i\sqrt{219.75} }{-6}$

$x=\frac{4.5 \pm i14.824 }{6}$

$x=0.75 \pm 2.47067i$

7 0

3 years ago

Exercise - 4<br>1 Express the following angles into sexagesimal second<br>a. 20° 20

liubo4ka [24]

Answer:

202000''

Step-by-step explanation:

(20*100*100)+(20*100)

200000+2000

202000

5 0

3 years ago

The rectangular rug in Marcia's living room measures 12 feet by 109 inches. What is the rug's area in square feet?

Marrrta [24]

Answer:

109 square feet.

Step-by-step explanation:

109 in: = 109/12 = 9.0833333.... = 9 5/60 = (540+5)/60 = 545/60

Area = L*w

L = 545/60 feet

W = 12 feet

Area = 545/60 * 12

Area = 545*12/60

Area = 545 /5 = 109 square feet.

3 0

3 years ago

Find the midpoint of the line segment whose endpoints are (3, 10) and (7, 8).

Stels [109]

Answer:

Option 2 is correct.

Step-by-step explanation:

Given the coordinates of lines segment (3, 10) and (7, 8). we have to find the mid-point of given line segment.

Mid-point formula states that if $(x_1,y_1)$ and $(x_2,y_2)$ are the coordinates of end points of line segment then the coordinates of mid-point are

$(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$

∴ Coordinates of mid-point of line segment joining the points (3, 10) and (7, 8) are

$(\frac{3+7}{2},\frac{10+8}{2})=(\frac{10}{2},\frac{18}{2})=(5,9)$

Hence, option 2 is correct.

6 0

3 years ago

Read 2 more answers

Please help! Will give the brainiest!!

Eduardwww [97]

Answer:

1. SSS; Triangle ABC is congruent to Triangle DEF; sorry there's no triangle symbol on here.

2. HL; CBA is congruent to ZYX; or ABC is congruent to XYZ

Step-by-step explanation:

5 0

2 years ago