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Nezavi [6.7K]
4 years ago
7

Help please on 7 & 8

Mathematics
2 answers:
enot [183]4 years ago
7 0
Do a method that I like to call PEMDAS solve what is inside parentheses then exponents, multiply, divide, add, and subtract !!
Aleonysh [2.5K]4 years ago
4 0
PEMDAS

7.
(7+2y) 9y
3 times 6.5 is 19.5

=19.5+x-xTIMES 9y

I'm sorry if these aren't 100% correct but I just did it how I learned but I sort of forgot and that's how I remember...

8.
2 times 8.7 is 17.4
2 times 1.5 is 3
17.4+3 is 20.4
20.4+3 is 23.4
8.7+1.5 is 10.2
10.2 times 23.4 is 33.6
1.5 times 1.5 is 2.25
33.6-2.25 = 31.35
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What is the answer for <br> k + 0 = k
BabaBlast [244]

Answer: k=1 which equals 1k.  

Step-by-step explanation:

k+0=k

k is really 1k

so the real equation is 1k+0=1k because 1k+0 means nothing really it's still 1k.  

3 0
3 years ago
1. Factor completely: 2a^2 + 6a + 18
USPshnik [31]

Answer:

2(a+3)(a+3)

5(x+1)(x-1)

3t(t-2)(t+8)

n(2+n)(2-n)

Step-by-step explanation:

Factor each expression

2a^2 + 6a + 18

2(a^2 + 3a + 9)

product =9 and sum =6

3 times 3 is 9

3 plus 3 is 6

2(a+3)(a+3)

2. Factor completely: 5x^2 − 5

GCF is 5

5x^2 - 5

5(x^2 - 1)

5(x+1)(x-1)

3. Factor completely: 3t^3 + 18t^2 − 48t

3t^3 + 18t^2 -48t

3t(t^2 + 6t -16)

product is -16 and sum is 6

-2 times 8 = -16

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3t(t^2 + 6t -16)

3t(t-2)(t+8)

4. Factor completely: 4n − n^3

n(4 -n^2)

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7 0
3 years ago
Help help help helpppp
lord [1]

Answer:

39.7

Step-by-step explanation:

first must calculate the length of AB and BC

AB = 16.43

CB= 12.216

then perimeter : Perimeter of a triangle = sum of all three sides

16.43 + 11 + 12.216 = 39.646 = 39.7

4 0
4 years ago
The ordered pairs model an exponential function, where p is the function name and t is the input variable. What is the function
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Pavel [41]
4 1/2 is the exact answer. 5 is the estimate.
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