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3 years ago

What is GCF and LCM of -21 and 80? ASAP! Please Help! Will give Brainliest! Explanation Please! Love you forever!

Mathematics

1 answer:

djverab [1.8K]3 years ago

7 0

I got u ;)

Its just like ur other question!

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Find the zeros of the quadratic function: y = 6(7x + 9)(8x – 3)

Advocard [28]

Answer:

hello :- 9/7 and 3/8

Step-by-step explanation:

y = 6(7x + 9)(8x – 3)

y=0 means : 7x+9=0 or 8x-3=0

7x = -9 or 8x=3

x= - 9/7 or x= 3/8

8 0

3 years ago

Read 2 more answers

Which is equation is equivalent to 3 = 87 divided by h

SSSSS [86.1K]

Answer:8 5/9

Step-by-step explanation:

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3 years ago

In which place is the first place of the quotient? 3,589 DIVIDED BY 18

xxMikexx [17]

The quotient of 3589 ÷ 18 is 199.388. The first digit is the hundreds place

7 0

3 years ago

I need answer quickly

DerKrebs [107]

Answer: a is the # of elements in A but NOT B, that is A ONLY

b is the # of elements in B but NOT A, that is B only

N is the # of elements in the INTERSECTION of A and B

a + N = 99

b + N = 25

a + b + N = 123

Subtracting the first two equations: a - b = 74

Subtracting the last two equations: -a = -98

a = 98

So then a - b = 74 and a = 98

98 - b = 74

-b = -24

b = 24

a = 98, b = 24 and a + b + N = 123

98 + 24 + N = 123

122 + N = 123

N = 1

98 are in A only

24 are in B only , which is the answer to the question

1 is in both A and B

Step-by-step explanation:

4 0

3 years ago

A piece of wire 40 cm long is to be cut into two pieces. One piece will be bent to form a circle and; the other will be bent to

Brums [2.3K]

<h3>The perimeter of circle = 17.6 cm</h3><h3>Perimeter of square = 22.4 cm</h3>

Step-by-step explanation:

The total length of the wire = 40 cm

Let us assume the circumference of the circle = k cm

So, the circumference of the square = ( 40 - k) cm

Now,as circumference of circle = 2πR

⇒2πR = k cm or, R = $(\frac{k}{2\pi})$

Area of the circle = πR²

or, A = $\pi (\frac{k}{2\pi} )^2$

$= \pi \times (\frac{k^2}{(2\pi)^2} ) = \frac{k^2}{4 \pi} \\\implies A = \frac{k^2}{4 \pi}$ ....... (1)

Similarly , perimeter of square = 4 x Side

⇒ 4 x Side = ( 40 - k) cm ⇒ S = $(\frac{40 - k}{4} )$

Area of the square = (Side)² = $(\frac{40 - k}{4} ) ^2$

Solving, we get: $A = \frac{1600 + k^2 - 80 k}{16}$ ....... (1)

So, combining (1) and (2), total area A is

$A = (\frac{k^2}{4 \pi} ) + \frac{k^2 + 1600 - 80 k }{16}$

or, we get: A = 0.07962 k² + 0.0625 k² + 100 - 5 k

A = 0.1422 k² - 5 k + 100

For axis of symmetry : $k = (\frac{-b}{2a} ) = (-\frac{-5}{2(0.1420}) = 17.6$

⇒ k = 17.6 inches

So, the perimeter of circle = 17.6 cm

Perimeter of square = (40 - 17.6 ) = 22.4 cm

3 0

3 years ago