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serious [3.7K]
3 years ago
11

Look at the following math problems. 10 + 2 = 12 12 − 2 = 10 What are these operations called?

Mathematics
1 answer:
Anettt [7]3 years ago
3 0

Answer:

i think it might be fact families

Step-by-step explanation:

this is because they use the 3 same #rrs

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7. The hexagon GIKMPR is regular. The dashed line segments form 30 degree angles. what is the image of oh after a rotation of 18
velikii [3]

Answer:

The image of OH is ON.

Step-by-step explanation:

Te figure GIKMPR is a regular hexagon. The number of vertices of a regular hexagon is 6. The central angle between any two consecutive vertices is 60 degree.

The dashed line segments form 30 degree angles.

If we rotate the hexagon 180 degree about O, then the each point shifts to 6th place from its original place.

Since we rotate the hexagon 180 degree about O, so the image and preimage lies on a straight line. Because a straight line make angle of 180 degree.

The line OH and ON lies on a straight line therefore the image of OH is ON.

3 0
3 years ago
SIMPLIFY THIS POLYNOMIAL EXPRESSION:<br> 4 (5X2 + 2) - (-4X2 + 7).<br> + (- 3X2-5)
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Answer:

6x^2-10

Step-by-step explanation:

You add like terms. All the x^2 you add them and you add together the ones that are not multiplied by x. Make sure to distribute the negative.

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3 years ago
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Rae earns $8.40 an hour plus an overtime rate equal to 1(1/2)times her regular pay for each hour worked beyond 40 hours. What ar
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At $8.40 an hour for a 40 hour week the earnings would be $336. With 5 hours overtime the pay would be $12.60 an hour which equals $63 making her earnings a total of $399 for the 45 hour work week. would be Step-by-step explanation:

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Prove that a line parallel to one side of a triangle divides the other two sides proportionally. Be sure to create and name the
ryzh [129]

Answer:

in steps

Step-by-step explanation:

DE // BC

m∠ADE = m∠ABC   and m∠AED = m∠ACB

∴ ΔADE similar to ΔABC

AB/AD = AC/AE

(AD + DB) / AD = (AE + EC) / AE

AD/AD + DB/AD = AE/AE + EC/AE

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DB/AD = EC/AE    (AD/DB = AE/EC)

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B) AD/DE = BD/AD

Step-by-step explanation:

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2 years ago
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