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Kruka [31]
3 years ago
8

Explain how using basic facts can help you find 10x20x30x40 mentally

Mathematics
2 answers:
murzikaleks [220]3 years ago
6 0

Answer:

first multiply 1 times 2 which is easy 2, then 2 times 3 which is 6, then 6 times 4

After add up the zeros and there are 4 zeros so the answer is

40000

Step-by-step explanation:

Bess [88]3 years ago
6 0

Answer:

multiply the first number 1*2*3*4 then add the zeros

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Peyton has 5/8 of pumpkin pie left over from thanksgiving. She eats 1/8 of the pie and her friend joy eats 1/6 of the pie. How m
neonofarm [45]

Answer:

1/3

Step-by-step explanation:

Left over pie=5/8

Payton eats=1/8 of the left over pie

Joy eats =1/6 of the left over pie

Total pie eaten by Payton and joy= 1/8+1/6

To add the fraction,

Find the lowest common multiple of 6 and 8 which is 48

Then,

divide 48 by 8 multiplied by 1 which is 6,

divide 48 by 6 multiplied by 1 which is 8

We have,

=6+8/48

=14/48

=7/24

Total pie eaten by Peyton and joy=7/24

Total pie left(after Peyton and joy share)= Total left over- total pie eaten by Peyton and joy

=5/8-7/24

=15-7/24

=8/24

=1/3

8 0
3 years ago
Which graph shows the solution to the system of linear inequalities y>1/3x+1, y>2x-3
ElenaW [278]

For this case we have the following system:

y> \frac {1} {3} x + 1\\y> 2x-3

To solve, we first change the inequality for an equality:

y = \frac {1} {3} x + 1\\y = 2x-3

Matching we have:

\frac {1} {3} x + 1 = 2x-3\\\frac {1} {3} x-2x = -3-1\\- \frac {5} {3} x = -4\\\frac {5} {3} x = 4\\5x = 12\\x = \frac {12} {5}

So:

y = 2x-3\\y = 2 (\frac {12} {5}) - 3\\y = \frac {24} {5} -3\\y = \frac {9} {5}

Thus, (\frac {12} {5}, \frac {9} {5})is the point of intersection of the lines.

Answer:

The graphic is attached

6 0
3 years ago
How many dimes did she have
Marina CMI [18]
She had 15 dimes. That's the answer
8 0
3 years ago
What is the value of 9+21 (13+5)?<br> A.287<br> B.395<br> C.387<br> D.540
Vika [28.1K]
Follow the order of operations
1. parentheses (13+5) = 18
2. multiplication 21*(13+5) = 21*18 = 378
3. add 9 + 21*(13+5) = 9 + 378 = 387

Hope this helps!
6 0
3 years ago
Read 2 more answers
Haydn made a scale model of a building. The actual height of the building is 75 feet. Haydn's model used a scale in which 1.5 in
vfiekz [6]

Answer:

3.75

Step-by-step explanation:

1.5 equals 30 ft so x2 equals 60 then 15 is half of 20 so half of 1.5 in is .75 so 3 plus .75

7 0
3 years ago
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