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Flura [38]
3 years ago
9

Please help me with this.

Mathematics
1 answer:
-Dominant- [34]3 years ago
5 0

Answer:

3

Step-by-step explanation:

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

3^4 +9^2÷3^3-9^2

81+81÷27-81

81+3-81

3

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Elizabeth spends $12.40 on a new CD. This amount is 62% of her monthly allowance. Find the amount of Elizabeth's monthly allowan
valkas [14]

Answer:

20.00

Step-by-step explanation:

6 0
3 years ago
Which shows a perfect square trinomial?
anastassius [24]
The answer is <span>c. 16x2 + 24xy + 9y2.

Since we need trinomial (three term expression) choices a and b are incorrect because they have only two terms.

So, our square trinomial is a</span>² + 2ab + b² or a² - 2ab + b²
a² + 2ab + b² = (a + b)²
a² - 2ab + b² = (a - b)²

Let's check choices c and d:
c) 16x² + 24xy + 9y²
a² = 16x²
a² = (4x)²
a = 4x

b² = 9y²
b² = (3y)²
b = 3y

a² + 2ab + b² = (4x)² + 2 * 4x * 3y + (3y)² = 16x² + 24xy + 9y²
CORRECT

d) 49x² - 70xy + 10y²
a² = 49x²
a² = (7x)²
a = 7x

b² = 10y²
b² = (y√10)²
b = y√10

a² + 2ab + b² = (7x)² + 2 * 7x * y√10 + (y√10)² = 49x² + 14xy√10 + 10y²
INCORRECT

So, c) is correct answer
8 0
3 years ago
Read 2 more answers
I NEED HELP ASAP!!!!
abruzzese [7]
Answer is 4/7

You divide the length of C'D' over the length of CD
C'D'/CD = 8/14 = 4/7

The scale factor is smaller than 1, so C'D' is shorter than CD
8 0
3 years ago
A store sells notebook for 3$ each and does not charge sales tax. If x represents the number of notebooks Adele buys and y repre
Crazy boy [7]
You need to multiply 3x to find y. 
4 0
2 years ago
You are dividing 30 tomato plants into equal rows for planting. how many possibilities are there?​
Ierofanga [76]

Answer:

6,5 5,6 3,10 10,3 1,30 30,1 2,15 15,2 = 8 possibilities

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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