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stealth61 [152]

2 years ago

10

there are $3.90 worth of nickles and quarters in a piggy bank. there are 6 more quarters than nickels. how many coins are in the

piggy bank

1 answer:

Murrr4er [49]2 years ago

4 0

Answer:

8 nickels and 14 quarters

Step-by-step explanation:

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3/11 divided by 3/11

vladimir2022 [97]

Answer: 1

Step-by-step explanation:

When dividing fractions, we follow a rule called keep, change, flip:

3/11 * 11/3

33/33

1

5 0

3 years ago

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Which of the following creates 90° angles at the points of intersection and also cuts a segment into two congruent pieces?

IgorC [24]

Perpendicular bisector

8 0

3 years ago

How do you find the total sum of squared values?

tester [92]

Answer:

Step-by-step explanation:

$\sum^{12}_{r=1} r^2 = \frac{12(12+1)(2*12+1)}{6}= A$

$\sum_{r=3}^{12}= \sum_{r=1}^{12} - (r_1+r_2)$

$r_1= 1^2$

$r_2= 2^2$

you do your math!!

7 0

3 years ago

How much simple interest would $1 ,400 earn in 12 months at an interest rate of 3.25%?

goldfiish [28.3K]

Answer:

$45.50

Step-by-step explanation:

Interest = Principal x rate x time (in years)

I = 1400 x .0325 x 1

3 0

3 years ago

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50 POINTS!!! Plz show work questions are in the addon

emmasim [6.3K]

1. Each term in this polynomial has a common factor of $3x^3$ :

$12x^6-9x^4+18x^3=3x^3(4x^3-3x+6)$

2. Not sure what the "vertical method" is, but I would guess it refers to some way of visualizing the distributive property.

$(3x-5)(2x^2+7x-3)=3x(2x^2+7x-3)-5(2x^2+7x-3)$

$(3x-5)(2x^2+7x-3)=(6x^3+21x^2-9x)+(-10x^2-35x+15)$

$(3x-5)(2x^2+7x-3)=6x^3+11x^2-44x+15$

3. You can use the same approach as in (2), or recall that $(a+b)^2=a^2+2ab+b^2$ :

$(5x-4y)^2=(5x)^2+2(5x)(-4y)+(-4y)^2$

$(5x-4y)^2=25x^2-40xy+16y^2$

4. Recall that a difference of squares can be factored as $a^2-b^2=(a-b)(a+b)$ . So

$(2x^2-7)(2x^2+7)=(2x^2)^2-7^2$

$(2x^2-7)(2x^2+7)=4x^4-49$

7 0

3 years ago