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Nataly [62]
3 years ago
13

Piper claims that 3(2a + 2) is equivalent to 5a + 6. She checks her claim by substituting -3 for a. Is Piper's claim correct? Wh

y or Why not?
Please Help SOS!!!
Mathematics
1 answer:
Natali5045456 [20]3 years ago
4 0

Answer:

Piper's claim that 3(2a+2) is equal to 5a +6 is incorrect.

Step-by-step explanation:

The first step is to use the distributive property to distribute the 3 to BOTH the 2a and 2. The resulting expression is 6a+6 NOT 5a+6. Piper's mistake was most probably that she added 3 and 2 to get 5 instead of multiplying them together to get 6.

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I need help.like now please help me !!!!!!!!!
koban [17]
Use proportions for all of them, for #1 use the proportion 12/30 = 9/a based on corresponding sides and then cross multiply. a=22.5 For #2 use the proportion y/35 = 64/40 based on corresponding sides and then cross multiply, y=56 For #3 use the proportion 42/? = 54/36 and then cross multiply, ?=28
7 0
3 years ago
Determine the slope between the points (5, -5) and (-1, 7)
meriva

Answer:

slope = 3

Step-by-step explanation:

5 - x1 -5 - y1

-1- x2 7 - y2

m= y2 - y1 / x2 - x1

m= 7 - (-5) / -1 -(-5)

m= 12 / 4

m= 3

4 0
2 years ago
Read 2 more answers
A deer population is declining by 2.2% per year. The population can be modelled using the formula p = 240(0.978)n , where P is t
ale4655 [162]

Answer:

The current deer population is 240.

Step-by-step explanation:

The expression given models a exponential decay follows:

p(n) = 240*(0.978)^n

For every year that passes since the beginning of the count the population is 0.978 of the year prior. Assuming that the count starts at this year, then "n" is equal to 0, applying this value of n to the formula gives us:

p(0) = 240*(0.978)^0\\p(0) = 240*1 = 240

The current deer population is 240.

3 0
3 years ago
Can someone please help me
Oksana_A [137]
The answer is -31 over 12.
5 0
2 years ago
Read 2 more answers
Which expression is equivalent to<br> (5^-2)(5^-1)<br> A. -1/125<br> B. -1/5<br> C. 1/125<br> D. 1/5
n200080 [17]

Answer:

1/125

Step-by-step explanation:

(5^-2)(5^-1) = 5^-3=1/5^3=1/125

3 0
3 years ago
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