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3 years ago

What is the friendly numbers strategy

Mathematics

1 answer:

kogti [31]3 years ago

8 0

I think what you're trying to say is basic facts? Idk comment me back if you need more help thanks!

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Divide thirty-one point five by ten

Nutka1998 [239]

3.15 will be your answer i am very sure of that

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3 years ago

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1 point<br> 9) A 12-foot long sub sandwich is cut into 7 equal pieces. How long is each<br> piece? *

Makovka662 [10]

Answer:

20 4/7 inches

Step-by-step explanation:

Take 12 feet and convert to inches

1 ft = 12 inches

12 * 12 = 144 inches

Divide by 7

144/7 =20 with 4 left over

20 4/7 inches

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4 years ago

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Prove that if xy > 0, then either x > 0 and y > 0 or x < 0 and y < 0

Rufina [12.5K]

The rule of product states that:

$(+) \cdot (+) = (+)$
$(+) \cdot (-) = (-)$
$(-) \cdot (+) = (-)$
$(-) \cdot (-) = (+)$

So, a product is positive if and only if both factors have the same sign, and is negative if only if the factors have opposite sign.

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3 years ago

Find the product and simplify your answer. 7a5(-3a4+5a-5)

Alex Ar [27]

$\text{Hey there!}$

$\mathsf{Use\ distributive\ property\ to\ solve}}\\\\\text{The formula is : a(b + c)=a(b)+a(c)=b+ac}\\\\\mathsf{7a^5(-3a^4+5a-5)}\\\\\mathsf{7a^5(-3a^4)=-21a^9}\\\\\mathsf{7a^5(5a)=3a^6}\\\\\mathsf{7a^5(-5)=-35a^5}$

$\boxed{\boxed{\mathsf{Your\ answer: \boxed{\mathsf{-21a^9+35a^6-35a^5}}}}}}\checkmark$

$\text{Good luck on your assignment and enjoy your day!}$

~ $\dfrac{\frak{LoveYourselfFirst}}{:)}$

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3 years ago

On a roadtrip, the distance driven can be represented by

Viefleur [7K]

Answer irdk just need points lol.

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3 years ago