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3 years ago

15

Find the product (3a+3b)(3a-2b)

1 answer:

vitfil [10]3 years ago

6 0

Answer:

9a^2 + 3ab + 6b^2

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Samantha and Mia each left Julia’s house at the same time. Mia walked north at 7 kilometers per hour. Samantha ran west at 11 ki

Lena [83]

Mia walked 7km/h so after 1 hour, she is 7 km north of the house of Julia

Samantha walked 11km/h so after 1 hour, she is 11 km west of the house of Julia.

The points where Mia and Samantha are after 1 hour , and the house of Julia form a right triangle with sides 7 and 11 km. The distance between the girls, is the hypotenuse of his triangle.

by the pythagorean theorem:

$MS= \sqrt{ 7^{2} + 11^{2} }= \sqrt{49+121}= \sqrt{170}= 13 (km)$

Answer: 13 km

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3 years ago

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Subtract - 2x - 10 from 10x2 + 3.

krok68 [10]

Answer:

10x2 + 2x + 13.

Step-by-step explanation:

10x2 + 3 - (-2x - 10) (Note you have to put the -2x - 10 in brackets).

= 10x2 + 3 + 2x + 10 (Distributing the negative over the brackets).

= 10x2 + 2x + 13.

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3 years ago

There are 26 third graders and 32 fourth graders going on a field trip. each van carry 10 students. how many students are needed

Zolol [24]

26+32=58
6*10=60
6 vans are needed.
10 students will be in the each of the five vans. 8 students will be in the other van.

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3 years ago

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Sam has two apples and his mother takes away one how many does sam have left ?

riadik2000 [5.3K]

Answer:

1

Step-by-step explanation:

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3 years ago

The next train will arrive in 32 minutes and 30 seconds. In how many seconds will the next train arrive

sineoko [7]

You need to multiply the 30 with the 32

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3 years ago

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