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lions [1.4K]
4 years ago
14

If f(x) = 2x2 + 1, what is f(x) when x = 3?

Mathematics
2 answers:
serg [7]4 years ago
5 0
If we work out this particular equation according to the acronym PEMDAS (or parenthesis, exponents, multiplication, division, addition, subtraction) this can be easily done. The resulting equation would look as follows PEMDAS2(3)2+16(2)+112+112+1=13
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klasskru [66]4 years ago
5 0

Answer:

if we work out this particular equation according to the acronym PEMDAS (or parenthesis, exponents, multiplication, division, addition, subtraction) this can be easily done. The resulting equation would look as follows PEMDAS2(3)2+16(2)+112+112+1=13

Step-by-step explanation:

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find the length of a rectangular lot with a perimeter of 140 m if the length is 6 m more than the width.
satela [25.4K]
The width would be x.
the length would be x+6
there are two of each (since it’s a rectangle)
so x+x+x+6+x+6=140
simplify
x= 32
l= 38
w= 32
7 0
3 years ago
if there are 300 calories in 100 g of a certain food, how many calories are there in a 30 g portion of food​
kap26 [50]

Answer:

90 calories

Step-by-step explanation:

Calories : quantity of food

there are 300 calories in 100 g of a certain food

300 calories : 100 g food

how many calories are there in a 30 g portion of food​

Let x = number of calories

x calories : 30 g food

Equate both ratios

300 calories : 100 g food = x calories : 30 g food

300/100 = x/30

300 * 30 = 100 * x

9000 = 100x

x = 9000/100

x = 90

x = number of calories = 90 calories

6 0
3 years ago
Mr. Johnson currently has a square garden. He wants to redesign his garden and make it into a rectangle with a length that is 5
AlekseyPX

Answer:

Width of the rectangle = 10 feet

Length of the rectangle = 25 feet

Step-by-step explanation:

Perimeter of a rectangle = 2(length + width)

Let

Width of the rectangle = x feet

Length of the rectangle = 3x - 5 feet

Perimeter of the rectangle = 70 feet

Perimeter of a rectangle = 2(length + width)

70 = 2{x + (3x - 5)}

70 = 2{x + 3x - 5}

70 = 2(4x - 5)

70 = 8x - 10

70 + 10 = 8x

80 = 8x

Divide both sides by 8

x = 80 / 8

= 10

Width of the rectangle = 10 feet

Length of the rectangle = 3(10) - 5

= 30 - 5

= 25 feet

6 0
3 years ago
I need the answers for 8-11
Amiraneli [1.4K]
The answer is negative three ( -3 )
8 0
3 years ago
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$3,000 after 5 years at an interest rate of 3.0 % is the nearest cent.
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<span>$ 3,450.00

</span>Equation:
A = P(1 + rt)
6 0
3 years ago
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