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3 years ago

5

Ella has 50 stacks of ten pennies in each stack. Describe how to find how many pennies Ella has in all

2 answers:

kkurt [141]3 years ago

8 0

She can either 10x50=500 or count by 10s

k0ka [10]3 years ago

6 0

You would do ten times fifty. which would be 500

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20 more than the product of a number n and five

PtichkaEL [24]

Answer:

5n + 20

Step-by-step explanation:

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2 years ago

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What is the measurement 345.067 mg rounded to four significant digits?

Viktor [21]

<span>count four from the first digit to the fourth one. When you see the fourth one, look at the digit after. if it is 5+ then the fourth digit increases by one. if 5- then it stays the same. 6>5 so 0 becomes 1.

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3 years ago

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What is the sixth term in the addition pattern that begins with 15,29,43,57?

WITCHER [35]

Answer:

C is your answer

Step-by-step explanation:

Add every number by 14

5 0

4 years ago

Please help!! thank you.

Zina [86]

(A) Product of $-2x^{3}+x-5$ and $x^{3}-3x-4$ is:

$(-2x^{3}+x-5)(x^{3}-3x-4)$

$=-2x^{3}(x^{3}-3x-4)+x(x^{3}-3x-4)-5(x^{3}-3x-4)$

$=(-2x^{3})(x^{3})+(-2x^{3})(-3x)+(-2x^{3})(-4)+x(x^{3})+(x)(-3x)+(x)(-4)+(-5)(x^{3})+(-5)(-3x)+(-5)(-4)$

$=-2x^{6}+6x^{4}+8x^{3}+x^{4}-3x^{2}-4x-5x^{3}+15x+20$

$=-2x^{6}+6x^{4}+x^{4}+ 8x^{3}-5x^{3}-3x^{2}-4x+15x+20$

$=-2x^{6}+7x^{4}+3x^{3}-3x^{2}+11x+20$

(B) Yes.

Product of $-2x^{3}+x-5$ and $x^{3}-3x-4$ = Product of $x^{3}-3x-4$ and $-2x^{3}+x-5$ because multiplication is commutative.

Commutative Property of multiplication says that a.b = b.a.

Thus, multiplication is same irrespective of the order of two numbers.

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3 years ago

Grace and her brother need $400 to go to band camp. Their parents have agreed

Virty [35]

Answer:

R. 25m + 10b = 400

Step-by-step explanation:

25m: $25 for time the mow the lawn

10b: $10 for every hour that they babysit their younger brother

400: They need $400 in total

+ : You need to add what they made for mowing the lawn and for babysitting.

6 0

3 years ago