2 years ago

How can properties of operations be used to add expressions?

Mathematics

1 answer:

Gelneren [198K]2 years ago

7 0

Use this. Hope it helps

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michael started a savings account and after 3 weeks, he had $500 dollars, and after 7 weeks, he had $900. What is the rate of ch

Inessa [10]

Answer: 100 dollars per week

Step-by-step explanation:

3 $500

4 $600

5 $700 > $100 per week

6 $800

7 $900

7 0

3 years ago

the local hardware store wants to increase their inventory. Last year 15 electric screwdrivers cost them 300.how much would 45 s

Harman [31]

One way of doing this is to write the equation of ratios (15 screwdrivers / 45 screwdrivers) = ($300 / x). Solve this equation for x. To do this, you might try multiplying both sides of this equation by x to eliminate fractions.

Another way is to obtain the unit cost of each screwdriver and then multiply the result by 45 screwdrivers.

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3 years ago

What is the coeffieent of (x^4)(y^4) in the expansion of (x+y)^8

kap26 [50]

ANSWER

The coefficient is 70.

EXPLANATION

The given binomial expression is

$(x+y)^8$

The specific term of a binomial expansion can be determined using the formula,

$T_{r+1}= nC_ra^{n-r}b^r$
where

$n=8,r=4,a=x,b=y$

We substitute these values into the formula to get,

$T_{4+1}= 8C_4x^{8-4}y^4$

We simplify to get,

$T_{5}= 70x^{4}y^4$

Hence the coefficient is 70.

4 0

3 years ago

Alicia's MP3 player contains 1,260 song. Given that 35% of the songs are rock songs and 20% of the songs are rap songs, how many

schepotkina [342]

1. 567
2. 33
3. 85%; $17
4. they have 4 pages left
5. (-5,2)

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3 years ago

Lara went to the nursery and spent $140 she purchased 4 plants each of the plant costs the same price what is the cost of 1 plan

trapecia [35]

Answer:

$35 per plant

Step-by-step explanation:

You take the 140 and divide that by 4 to get your answer.

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3 years ago