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3 years ago

What number goes in the missing space?

Mathematics

2 answers:

blsea [12.9K]3 years ago

8 0

The number should be 20

Natali5045456 [20]3 years ago

4 0

So to get from 4 to 8 you multiply by 2. To get from 8 to 16 you multiply by 2. So for the missing number, 10 times 2=20. The missing number should be 20. To check our work, 20 times 2 equals 40. So the missing number is 20. Hope this helps! ;)

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2x<15 solve for x Simplify equation

aniked [119]

Answer:

x<7.5

Step-by-step explanation:

2x/2<15/2
x<15/2

3 0

2 years ago

A rectangular plot of farmland will be bounded on one side by a river and on the other three sides by a single-strand electric

larisa86 [58]

Answer:

525 x 1,050

A = 551,250 m²

Step-by-step explanation:

Let 'L' be the length parallel to the river and 'S' be the length of each of the other two sides.

The length of the three sides is given by:

$2S+L=2,100\\ L=2100-2S$

The area of the rectangular plot is given by:

$A=S*L\\A=S(2100-2S)\\A=2100 S -2S^2$

The value of 'S' for which the area's derivate is zero, yields the maximum total area:

$\frac{dA(S)}{dS}=\frac{d(2100 S -2S^2)}{dS}\\0= 2100 - 4S\\S=525$

Solving for 'L':

$L=2100-(2*525)\\L=1,050$

The largest area enclosed is given by dimension of 525 m x 1,050 and is:

$A = 525*1,025\\A=551,250\ m^2$

5 0

3 years ago

How much is the sales tax on $29.50 worth of goods if the tax rate is 7%?

Dafna1 [17]

Answer: 2.065

Step-by-step explanation:

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2 years ago

Using the substitution method, answer the question. y=4x-3 y=-x+7

Nutka1998 [239]

Basically they're both equal
4x-3=x+7
-x. -x
3x-3=7
+3 +3
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X=10/3

7 0

3 years ago

Rita is spending more time at home to study and practice math. Her efforts are finally paying off. On her first assessment she s

Kipish [7]

Answer:

7th

Step-by-step explanation:

63 - 58 = 5

68-63 = 5

She is adding 5 points each time

a1 = 58

d = 5

a2 = 63

a3 = 68

a4 = 58+5 = 73

a5 = 73+5 = 78

a6 = 78+5 = 83

a7 = 83+5 = 88

This is the first assessment greater then 85, so the 7th assessment

4 0

2 years ago