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Mazyrski [523]
3 years ago
13

URGENT! When we solve (cos²x - 1 = 0) by adding and taking the square root, how come we get the same answer when we factor (cos²

x - 1) and use the zero product property to find the solution?
Mathematics
1 answer:
zysi [14]3 years ago
3 0

Answer:

It is the same answer because you still have the same x-1 and he exponent of 2. It doesn't matter about the zero unless you are trying to find the angle of a triangle.

Step-by-step explanation:

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What is the distance between the points (4, 3) and (1, -1) on the coordinate
Delvig [45]

The distance between the points (4, 3) and (1, -1) on the coordinate plane will be 5 units. Then the correct option is C.

<h3>What is the distance between two points?</h3>

The shortest distance (length of the straight line segment's length connecting both given points) between points ( p,q) and (x,y) is:

D² = (x - p)² + (y - q)²

The points are given below.

(4, 3) and (1, -1)

Then the distance between the points will be

D² = (4 - 1)² + (3 + 1)²

D² = 3² + 4²

D² = 9 + 16

D² = 25

D = 5 units

Then the correct option is C.

Learn more about the distance between two points here:

brainly.com/question/16410393

#SPJ1

7 0
2 years ago
If 25 students took an exam and 4 of them failed, what percent of them passed?
lisabon 2012 [21]

If 25 students took an exam and 4 of the students that took the exam failed, what percent of the students passed?

To find out how many students passed, we can subtract 4 from 25 and we will get a difference of 21.

The fraction \frac{21}{25} represents the number of students who passed the exam out of all the students.

To find out what percent of the students passed, we can turn \frac{21}{25} into a percent.

21 ÷ 25 = 0.84

0.84 × 100 = 84%

Therefore, 84% of the students who took the exam passed.

5 0
3 years ago
Anyone please help me???????
lara31 [8.8K]
The answer is B. y=2
3 0
3 years ago
if n represent number than write an expression for three times the difference of the number amd six increased by four times the
lorasvet [3.4K]

Let n be the number. The difference of the number and six is n-6. Then three times the difference of the number and six is 3·(n-6). This number 3·(n-6) increased by four times the number n, then

3·(n-6)=4·n.

Solve it:

3·n-3·6=4n,

3n-4n=18,

-n=18,

n=-18.

Answer: n=-18 and expression is 3·(n-6)=4·n.

6 0
3 years ago
if ZA and ZB are supplementary angles. if mZA = (3x-23) and mZB= (2x-12) then find the measure of ZB​
Brilliant_brown [7]

Answer:

mZB= 74

Step-by-step explanation:

ZB+ZA=180

3X-23+2X-12=180

5X-35=180

5X=180+35

5X=215  (then divide both sides by 5 to x be left alone.)

X=43....so ZB=2(43)-12

                     =86-12=74

3 0
3 years ago
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