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8_murik_8 [283]
2 years ago
8

Somebody please help me what is 15 / 3 ×7/20​

Mathematics
1 answer:
stellarik [79]2 years ago
8 0

Answer:

1.75

Step-by-step explanation:

By Order of Operations, You read it left to right since Multiplication and Division are of the same importance. You would start with 15/3, which is 5.

Then your equation would be:  5*7/20.

Again, you would just read it left to right, 5*7=35

Then divide by 20, which is 1.75.

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What is an equation of a circle with center (2,7) and radius 4?
goblinko [34]

Equation of a circle:

(x - h)^2 + (y - k)^2 = r^2


In this case:

<span>center (2,7) and radius 4 so h = 2, k = 7 and r = 4

</span>Equation:

(x - 2)^2 + (y - 7)^2 = 4^2

(x - 2)^2 + (y - 7)^2 = 16


Hope it helps.

8 0
3 years ago
Rectangle R has varying length l and width w but a constant perimeter of 4 ft. A. Express the area A as a function of l. What do
ivanzaharov [21]
Given:
l = length of the rectangle
w = width of the rectangle
P = 4 ft, constant perimeter

Because the given perimeter is constant,
2(w + l) = 4
w + l = 2
w = 2 - l            (1)

Part A.
The area is
A = w*l 
   = (2 - l)*l
 A  = 2l - l²
This is a quadratic function or a parabola.

Part B.
Write the parabola in standard form.
A = -[l² - 2l]
   = -[ (l -1)² - 1]
   = -(l -1)² + 1
This is a parabola with vertex at (1, 1). Because the leading coefficient is negative the curve is downward, as shown below.

The maximum value occurs at the vertex, so the maximum value of A = 1.
From equation (1), obtain
w = 2 - l = 2 - 1 = 1.
The maximum value of the area occurs when w=1 and l=1 (a square).

Answer:
The area is maximum when l=1 and w=1.
The geometric argument is based on the vertex of the parabola denoting maximum area.

4 0
3 years ago
about 0.4 of a biology class will be going on a field trip. Express the decimal as a fraction in simplest form.
Illusion [34]
I believe you could also write 0.4 as 4/10
4 0
3 years ago
Read 2 more answers
How to simplify 8(7+8u)
Sliva [168]

Answer:

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Step-by-step explanation:

distribute the 8

56+64u

8 0
3 years ago
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How much sales tax would you pay on a dirt bike that cost $215 with a 5.3%<br> sales tax?
Archy [21]

Answer:

11.40

Step-by-step explanation:

215×0.053=11.395 rounded up to $11.40

7 0
3 years ago
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