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Lelechka [254]
3 years ago
12

Use doubles to find the sum of 7 + 8 write a number sentence

Mathematics
2 answers:
liberstina [14]3 years ago
4 0
7 plus 7 equals 14. Add one to that and you have 15 which is the answer.
DanielleElmas [232]3 years ago
4 0
*******
********      <<== doubles fact

7+8= 15    (number sentence)

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If U = the set of odd natural numbers and B = {13, 15, 17, 19, 21, 23, . . .}, find B′.
Yuki888 [10]

Answer:

{1,3,5,7,9,11}

Step-by-step explanation:

B' stands for the complement of B.

B' means set elements in the universe that aren't in B.

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U={1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,...}

(The dots mean it continues with that pattern forever and ever.)

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B={13,15,17,19,21,23,...}

So we taking out the odd numbers from U that are odd and greater than or equal to 13. (The dots mean it continues with that pattern forever and ever.)

So B' is the set of natural odd numbers that are less than 13:

{1,3,5,7,9,11}

8 0
3 years ago
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Which line is parallel to the line that passes through the points (1,7) and (-3, 4)?
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Answer:

Step-by-step explanation:

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3 years ago
What is bigger 9/10 or .71
yuradex [85]
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3 years ago
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sergey [27]

Answer:

Step-by-step explanation:

<em>Cost of game = $120</em>

<em>Current savings = $30</em>

<em>Rate for babysitting (per hour) = $5/hour</em>

<em></em>

<em>So, required equation is :-</em>

<em>120 = 5h + 30</em>

<em>5h = 90</em>

<em>h = 18</em>

<em></em>

<em>She must make $90 by babysitting for 18 more hours.</em>

7 0
2 years ago
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