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3 years ago

Find 10-3. write the subtraction fact two ways.

2 answers:

6 0

10 - 3 = 7

If you want to prove this, then all you have to do is check if adding the solution to the subtrahend.

7 + 3 = 10

Therefore 10 - 3 = 7

Katena32 [7]3 years ago

3 0

10-3= 7
•
7+3= 10
3+7= 10

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What is the slope of the line y = -2?

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Answer:

Step-by-step explanation:

There is no x, therefore there is no slope.

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Elijah's father is 47. He is 17 years older than twice Elijah's age. How old is Elijah?

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Answer:

Step-by-step explanation:

According to the described rule, we have

$a_1=7\\ \\a_1^2=7^2=49\Rightarrow a_2=4+9+1=14\\ \\a_2^2=14^2=196\Rightarrow a_3=1+9+6+1=17\\ \\a_3^2=17^2=289\Rightarrow a_4=2+8+9+1=20\\ \\a_4^2=20^2=400\Rightarrow a_5=4+0+0+1=5\\ \\a_5^2=5^2=25\Rightarrow a_6=2+5+1=8\\ \\a_6^2=8^2=64\Rightarrow a_7=6+4+1=11\\ \\a_7^2=11^2=121\Rightarrow a_8=1+2+1+1=5\\ \\\text{and so on...}$

We can see the pattern

$a_5=a_8=a_{11}=a_{14}=...=5\\ \\a_6=a_9=a_{12}=a_{15}=...=8\\ \\a_7=a_{10}=a_{13}=a_{16}=...=11$

In other words, for all $k\ge 2$

$a_{3k-1}=5\\ \\a_{3k}=8\\ \\a_{3k+1}=11$

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2 years ago