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2 years ago

What the property says that 5+13=13+5

Mathematics

2 answers:

Dmitry [639]2 years ago

7 0

Answer:

true it is true relly it is

Pavlova-9 [17]2 years ago

4 0

Answer: its true

Step-by-step explanation:

i got it right

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Find the total cost. purchase price = $2615; tax rate = 3%

Lisa [10]

$2693.45

hope it helps

6 0

3 years ago

Which expression converts 100 inches per minute to feet per minute?

Travka [436]

The answer is (inches/min)* (1ft/12in)

7 0

3 years ago

Read 2 more answers

Robert has available 400 yards of fencing and wishes to enclose a rectangular area. Express the areaAof the rectangle as a funct

solong [7]

Answer:

The answer is below

Step-by-step explanation:

a)Given that the length of fencing available is 400 yards. This means that the perimeter of the rectangle is 400 yards.

the perimeter of a rectangle is given as:

Perimeter = 2(length + width) = 2(l + w)

Hence;

400 = 2(l + w)

200 = l + w

l = 200 - w

The area of a rectangle is given as:

Area = length × width

Area = (200 - w) × w

Area = 200w - w²

b) For a quadratic equation y = ax² + bx + c. it has a maximum at x = -b/2a

Hence, for the area = 200w - w² a=-1, b = 200, the maximum width is at:

w = -b/2a = -200/2(-1) = -200/-2 = 100

A width of 100 yard has the largest area

c) l = 200 - w = 200 - 100 = 100 yards

Area = l × w = 100 × 100 = 10000 yd²

The maximum area is 10000 yd²

7 0

3 years ago

Which equation represents the line that passes through (-8.11) and<br>(4,7/2)?

Len [333]

Answer:

$y=-5/8x+6$

Step-by-step explanation:

$m=\frac{7/2 - 11}{4--8}$

$m=\frac{-15/2}{12}$

$m=-5/8$

$y=-5/8x+b$

$(-8,11)$

$11=-5/8 \times -8+b$

$b=11-(-5/8)(-8)$

$b=6$

6 0

3 years ago

Which components are a possible representation of vector w if the magnitude of vector -3w is ||-3w||=15?

Black_prince [1.1K]

Answer:

<-3,4>

<0,-5>

Step-by-step explanation:

|-3w| = 15

3|-w| = 3|w| = 15

|w| = $\frac{15}{3}$

|w| = 5

If vector w is represented by <1,-9>

Then |w| = $\sqrt{(1)^{2}+(-9)^{2}}=\sqrt{1+81}=\sqrt{82}\neq5$ .

Therefore this is not possible.

If vector w is represented by <-3,4>

Then |w| = $\sqrt{(-3)^{2}+(4)^{2}}=\sqrt{9+16}=\sqrt{25}=5$ .

Therefore this is possible.

If vector w is represented by <4,5>

Then |w| = $\sqrt{(4)^{2}+(5)^{2}}=\sqrt{16+25}=\sqrt{41}\neq5$ .

Therefore this is not possible.

If vector w is represented by <-5,-3>

Then |w| = $\sqrt{(-5)^{2}+(-3)^{2}}=\sqrt{25+9}=\sqrt{34}\neq5$ .

Therefore this is not possible.

If vector w is represented by <0,-5>

Then |w| = $\sqrt{(0)^{2}+(-5)^{2}}=\sqrt{0+25}=\sqrt{25}=5$ .

Therefore this is possible.

(NOTE : if z vector is represented by <x,y> then |z| = $\mathbf{\sqrt{x^{2}+y^{2}}}$ )

4 0

3 years ago