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Lerok [7]
3 years ago
5

6. How many of the integers between 20 and 40 areodd?b)11d)12c12​

Mathematics
1 answer:
IRINA_888 [86]3 years ago
7 0

Answer: 10

Step-by-step explanation:

List out the numbers:

20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40

There are 10 odd numbers

Otherwise a faster method:

Odd numbers occur every other number

There are 40 - 20 = 20 numbers between 20 and 40

20/2 = 10

10 odd numbers

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6 0
3 years ago
What is equivalent to -2i(6-7i)
borishaifa [10]

Answer:

-14 - 12i

Step-by-step explanation:

Apply complex arithmetic rule: (ai)(b + ci) = -ac + abi

a = 2, b = 6, c = -7

-( -2(-7) + 2*6i )

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5 0
3 years ago
A rectangle has length 4 inches and width 2 inches. If the length and width of the rectangle are each reduced by 50 percent, by
exis [7]

Answer: 25%

Step-by-step explanation:

Given: A rectangle has length 4 inches and width 2 inches.

Area = Length x width

= 4 inches x  2 inches

= 8 square inches

If length is reduced by 50% , then length =0.5\times4=2\text{ inches}

If width is reduced by 50% , then length =0.5\times2=1\text{ inch}

Reduced area = (reduced length) x (reduced width)

= 2 inches x 1 inch

= 2 square inches

The percentage of the area of the rectangle be reduced :-

\dfrac{\text{Reduced area}}{\text{Original area}}\times100 \\\\=\dfrac{2}{8}\times100\% \\\\=25\%

Hence, the percent of the area of the rectangle be reduced = 25%

6 0
3 years ago
Does anyone know the answer to this?
ss7ja [257]

Answer: equation: y=-4x+1

slope: -4

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3 0
1 year ago
What is the missing constant term in the perfect square that starts with x^2+\dfrac{1}{2}xx
grandymaker [24]

Answer:

1/16

Step-by-step explanation:

Given the expression;

x^2+\dfrac{1}{2}x

To find a constant that will make it a perfect square, we will use the square if the half of coefficient of x

Coefficient of x = 1/2

half of Coefficient of x = 1/2*(1/2)

Half of Coefficient of x = 1/4

square of the half of coefficient of x = (1/4)^2

square if the half of coefficient of x = 1/16

hence the constant that will make it a perfect square is 1/16

7 0
3 years ago
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