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777dan777 [17]
3 years ago
13

Which of the expressions below can be factor using the difference of squares method

Mathematics
2 answers:
Alik [6]3 years ago
6 0
It would be D because both are positive and are square roots
Reika [66]3 years ago
3 0

Answer:C

Step-by-step explanation:

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Find the area of an equilateral triangle with apothem of 5cm.
Pani-rosa [81]

Answer:

16.64645cm²

Step-by-step explanation:

All of the angles are equal: A = B = C = 180/3 = 60°.

All of the sides are equal: a = b = c.

h = 5 cm, sin60 = h/a = 5/a, a = 5/sin60 = 5.77 cm.

Area = 1/2bh = 1/2 x 5.77 x 5.77 = 33.2929/2 = 16.64645cm²

6 0
4 years ago
Read 2 more answers
Work out the angle of x
Amiraneli [1.4K]

Answer:

a)

Cos60=1/2=0.5

b)

cos60=4/x

0.5=4/x

0.5x=4

0.5x/0.5=4/0.5

x=8

3 0
3 years ago
Forensic specialists can estimate the height of a deceased person from the lengths of the person's bones. These lengths are subs
Lera25 [3.4K]

Answer:

130.2845\leq h\leq 137.7245

Step-by-step explanation:

Given an inequality that relates the height h, in centimeters, of an adult female and the length f, in centimeters, of her femur by the equation

|h - (2.47f + 54.10)| \leq  3.72

If an adult female measures her femur as 32.25 centimeters, we can determine the possible range of her height by plugging f = 32.25cm into the modelled equation as shown:

|h - (2.47(32.25) + 54.10)| \leq  3.72\\|h - (79.9045 + 54.10)| \leq  3.72\\|h - (134.0045)| \leq  3.72\\

If the modulus function is positive then:

h - 134.0045 \leq  3.72\\h \leq 3.71+134.0045\\h\leq 137.7245

If the modulus function is negative then:

-(h - 134.0045) \leq  3.72\\-h+134.0045 \leq 3.72\\-h\leq 3.72-134.0045\\-h\leq -130.2845\\

multiply through by -1

-(-h)\geq  -(-130.2845)\\h\geq 130.2845\\130.2845\leq h

combining the resulting inequalities, the estimate of the possible range of heights will be 130.2845\leq h\leq 137.7245

8 0
3 years ago
10x - 4 = 16<br><br><br> What does x equal to?
Dennis_Churaev [7]

Answer:

x = 2

Step-by-step explanation:

First isolate the variable:

10x - 4 = 16

      +4   +4

10x = 20

Then get x by itself:

10x = 20

x = 20/10

x = 10

5 0
4 years ago
Four times the sum of a number and -3 is 28
tatuchka [14]

Answer:

The number is equal to 10

Step-by-step explanation:

Let x be the number

4(x-3)=28

x-3=7

x=10

8 0
3 years ago
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