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SVEN [57.7K]
2 years ago
8

Select the correct answer. What is the value of this expression when a = 7 and b = -4?

Mathematics
1 answer:
iragen [17]2 years ago
6 0

Answer:

hhj

Step-by-step explanation:

nnh

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What is the value of the expression 7−3? 343 −21 −1343 1343
Mrrafil [7]

Answer:

7-3 = 4

For the next one are you asking 343-21-1343(1343)?

Step-by-step explanation:

If it is then 343 - 21 - 1343(1343) = 321

PEMDAS --> cancel out to 1

343 - 21 - 1 = 322 - 1

321

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3 years ago
A.) Macy’s is having a Black Friday sale where everything is 30% off.
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Step-by-step explanation:

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(2) (x-7) (=3) (x+8)
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Use the distributive property to get 2x - 14 = 3x + 24. Subtract 24 from both sides to get 2x - 38 = 3x. Subtract 2x from both sides to get -38 = x.

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3 years ago
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The recursive rule for a geometric sequence is given.
barxatty [35]
Answer: The explicit rule for the geometric sequence is:
an=(2/5) (5)^(n-1), for n=1, 2, 3, 4, ...

Solution:

a1=2/5
an=5 (an-1)

n=2→a2=5 (a2-1)= 5 (a1)= 5 (2/5)→a2= (2/5) (5)
n=3→a3= 5 (a3-1)= 5 (a2)= 5 [(2/5) (5)]=(2/5) (5)^(1+1)→ a3=(2/5) (5)^2
n=4→a4= 5 (a4-1)= 5 (a3)= 5 [(2/5) (5)^2]= (2/5) (5)^(2+1)→ a4=(2/5) (5)^3

a1=2/5=(2/5) (1)=(2/5) (5)^0→a1=(2/5) (5)^(1-1)
a2=(2/5) (5)=(2/5) (5)^1→a2=(2/5) (5)^(2-1)
a3=(2/5) (5)^2→a3=(2/5) (5)^(3-1)
a4=(2/5) (5)^3→a4=(2/5) (5)^(4-1)

Then:
an=(2/5) (5)^(n-1), for n=1, 2, 3, 4, ...
5 0
3 years ago
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