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o-na [289]
3 years ago
14

Explain how usingbasic facts can help you find 10 x 20 x 30 x 40 mentally.​

Mathematics
2 answers:
Leokris [45]3 years ago
5 0

Answer:

Step-by-step explanation:

We know that 1x 2 is 2 (add the 2 zeros to make it 200)

And 3x4 is 12 (add 2 zeros and make it 1200) Then Add

Natasha_Volkova [10]3 years ago
3 0

Answer: 240000

Step-by-step explanation: 10 · 10 · 10 · 10 = 10000

1 · 2 · 3 · 4 = 24

 

10 · 20 · 30 · 40 = 240000

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maw [93]

Answer: 36in2

Step-by-step explanation:

A= base *height

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4 0
2 years ago
Write down the solution set for x<3 in the set of natural numbers.
Gre4nikov [31]

Answer:

domain:{ [3, ∞], int}

Step-by-step explanation:

this is every possible number that is an integer, so domain:{ [3, ∞], int}

note that the format may be different

4 0
3 years ago
Read 2 more answers
1 Select the correct answer. Multiply the binomials: (3x + 4)(5x - 2) A.15x2 + 20x-8b. 15x2 + 14x-8 c. 15x2- 14x-8 D. 15x2+ 14x8
leonid [27]

Multiply the binomials:



(3x + 4)(5x - 2)

\begin{gathered} =3x(5x\text{ - 2) + 4(5x - 2)} \\ =15x^2\text{ - 6x + 20x - 8} \\ =15x^2\text{ + 14x - 8} \end{gathered}

Final answer

Option B is the final answer

3 0
1 year ago
Find the slope of the line that passes through the<br> points (-4, 7) and (3,-2)
schepotkina [342]

Answer:

-9/7

Step-by-step

Slope Formula:

\frac{y_2-y_1}{x_2-x_1}

We can plug in the numbers 7 and -2 for the y and -4 and 3 for x

\frac{7-(-2)}{-4-3} =\frac{9}{-7}

8 0
2 years ago
A box measure 4 inches long x 7 inches deep x 13 inches high. What's it's volume in cubic inches
Nonamiya [84]

Answer:

364 inches cubed

Step-by-step explanation:

7 0
3 years ago
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