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mafiozo [28]
3 years ago
12

(197)^2-(97)^2 evaluate without using calculator or table​

Mathematics
1 answer:
Bezzdna [24]3 years ago
3 0

Answer:

29400

Step-by-step explanation:

formula:  \\  {a}^{2}  -  {b}^{2}  = (a + b)(a - b) \\ ( {197)}^{2}  - ( {97)}^{2}  \\  = (197 + 97)(197 - 97) \\  = 294 \times 100 \\  = 29400 \\

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If the circle below is cut from the square of plywood below, how many square inches of plywood would be left over? Use π = 3.14,
Elis [28]

Answer:

86in²

Step-by-step explanation:

Find the complete question attached

Area of the circle = πr²

Area of the square = L²

Length of the side of the square

r is the radius of the circle

r = L/2 = 20/2 =10in

Given

Length of the side of the circle = 20in

Area of the square = 20²

Area of the square = 400in²

Area of the circle =π(10)²

Area of the circle = 3.14(100)

Area of the circle= 314in²

Amount of plywood left over = 400in²-314in² = 86in²

8 0
3 years ago
If z is inversely proportional to r, and z= 32 when r=1.5, find r when z=8.
lions [1.4K]
Inversely proportional: z = k/r
k = 32 * 1.5 = 48
Plug that into equation
8 = 48/r
Multiply both sides by r
8r = 48
Divide by 8
r = 6
8 0
2 years ago
A chef makes a fruit salad using pears and mangos. Pears and mangos each cost $2.25 per fruit. The chef buys x pears and y mango
GrogVix [38]

Answer:

P=2.25x-----------1

M=2.25y----------2

Step-by-step explanation:

Step one:

given data

we are told that the cost of pears= $2.25 each

       and cost of mango= $2.25 each

Step two:

the chef bought x pears and y mangoes

let the total cost of pears be P

and for mango be M

P=2.25x-----------1

M=2.25y----------2

3 0
3 years ago
You have to pay 15p to park for every 8 minutes. How much would I pay to park for 90 minutes?
Ahat [919]

Answer:

I am not exactly sure but it is around 170p

Step-by-step explanation:

3 0
2 years ago
Does this seem answer seem correct?
Blababa [14]
I mean I think so I’m not completely sure it’s a really hard question
5 0
3 years ago
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