All categories

3 years ago

Complete the square x^2+4-12=0

Mathematics

1 answer:

Tatiana [17]3 years ago

5 0

Answer:

x = -6

x = 2

Step-by-step explanation:

x² + 4 - 12 = 0

= (x + 6)(x - 2)

x + 6 = 0

x = -6

x - 2 = 0

x = 2

You might be interested in

Kameryn types 75 words per minute and is just starting to write a term paper. Joe already has 510 words written and types at a s

NARA [144]

Answer: Kameryn will have typed more words than Joe after 34 minutes

7 0

4 years ago

What is the missing angle measurement

OleMash [197]

Answer:

option c. 80 degree

Step-by-step explanation:

answer = 80 degree

8 0

3 years ago

Which of the following is the best estimate of 31% of 15? 7.5 3 5 4

Alex777 [14]

Th answer is 5 because 31% of 15 is 4.65

3 0

3 years ago

Read 2 more answers

HELP ME SOLVE THIS ASAP

vampirchik [111]

Answer:

∠B = 60°

a = 4.0 units

b = 6.9 units

Step-by-step explanation:

The triangle is right angled. The sum of all angles of a triangle is equal to 180 degrees.

The 3 angles are 90, 30 , ∠B .

$90+30+B = 180$

Thus, B = 180 - 120 = 60 degrees

by trigonometry,

sin(30) = $\frac{a}{8}$ = 0.5

a = (8)(0.5) = 4 units

Also,

cos(30) = $\frac{b}{8}$ = 0.866

b = (8)(0.866)= 6.928

3 0

4 years ago

An accident at an oil drilling platform is causing a circular oil slick. The slick is 0.07 foot thick, and when the radius of th

ololo11 [35]

Answer: $43.54 ft^3/min$

Step-by-step explanation:

Given

Thickness of oil slick=0.07 foot

radius of slick=110 ft

$\frac{\mathrm{d} r}{\mathrm{d} t}=0.9 ft/s$

Let V be the volume of oil slick

so, $V=0.07\pi \cdot r^2$

rate of oil flowing is

$\frac{\mathrm{d} V}{\mathrm{d} t}=0.07\times 2\pi \cdot r\frac{\mathrm{d} r}{\mathrm{d} t}$

$\frac{\mathrm{d} V}{\mathrm{d} t}=0.07\times 2\pi \times 110\times 0.9=43.54 ft^3/min$

7 0

3 years ago