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OlgaM077 [116]
3 years ago
6

You might need: Calculator

Mathematics
1 answer:
Fudgin [204]3 years ago
8 0

Answer:

Area = 153.8 cm/ m

Step-by-step explanation:

Area of circle = 22 ÷ 7 × r²

= 22 ÷ 7 × (7²)

= 22 ÷ 7 × 49

= 3.14 × 49

= 153.8 cm/ m

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If the least common multiple of 2 numbers is 60 and one number is 7 less then the other number what is the answer
Arte-miy333 [17]
Your question is not clear.  I must guess what you meant.  Did you mean "Find the two numbers?"

If so, let the two numbers be m and n.  Then mn=60 and m=n-7.

Then (n-7)(n) = 60, or n^2 -7n - 60 = 0.  This factors:  (n+5)(n-12) = 0 

Thus, n = -5 or n = 12.

check:  does mn = 60?  Does 12*5 = 60?  Yes.  Is m (which is 5)  7 less than n (which is 12)?  Yes.

Note that you could also check to see whether n=-5 and m=n-7=-5-7=-12 is also a solution.
5 0
3 years ago
I need an answer to 2. a and b and 3. a
Katen [24]

The square of an odd number:

We're to conjecture, not do algebra, apparently.  1²=1, 3²=9, 5²=25, 7²=49, ...

We conjecture the square of an odd number is odd.

The product of two evens and an odd:

Again, we'll run some examples.

(2)(2)(1)=4

(2)(4)(3)=24

(4)(6)(5) =120

(4)(8)(1)=32

Conjecture: The product of two evens and an odd is a multiple of 4


Counterexample: The product of two fractions is never an integer

How about

3/4 × 4/3 = 1


4 0
4 years ago
How do I graph this equation on a graph
Sergeu [11.5K]

Answer:

The equation is in standard form. You will have to convert it to slope intercept form, which is -0.125x + 3.75 = y

Step-by-step explanation:

s = x and a = y, therefore 0.5x + 4y = 15

0.5x + 4y = 15

0.5x + 4y = 15  first subtract  0.5x

4y = -0.5x + 15   then divide all by 4

y = -0.125x + 3.75  slope intercept form

8 0
3 years ago
Suppose you invest $1050 at an annual interest rate of 5.5% compounded continuously. How much will you have in the account after
horsena [70]
<span>$28,875 I think?
pretty sure that's rounded.

</span>
7 0
4 years ago
Cos(a+b)cosb+ sin(a+b)sinb= cosa
Leviafan [203]

Step-by-step explanation:

\cos \: (a + b) \: cos \: b +  \sin \: (a + b) \: sin \: b  \\ =  \cos \: a \\ LHS  \\ =  \cos \: (a + b) \: cos \: b +  \sin \: (a + b) \: sin \: b   \\  =  \cos \{(a + b) -  b \} \\  =  \cos (a + b-  b ) \\ =  \cos  \: a  \\  = RHS \\  \\ formula \: used \\  \cos \:a \: cos \: b +  \sin \: a \: sin \: b =  \cos(a - b)

8 0
3 years ago
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