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2 years ago

Help please! I just need to know how to do this step by step...

Mathematics

2 answers:

Alex787 [66]2 years ago

7 0

-8 - 5n = 64 + 3n

+5n +5n add 5n to both sides, 5n's cancel out on the left.

______________

-8 = 64 + 8n

-64 -64 subtract 64 on both sides, 64's cancel out on the right.

______________

-72 = 8n

___ ___ divide 8 on both sides, 8's cancel out from the right.

8 8

n= -9, final answer

pashok25 [27]2 years ago

3 0

Answer:

-8 - 5n= 64 + 3n

+8 +8

=0 =72

-5n= 72 + 3n

-3n -3n

-8n= 72 divide both sides by -8

n= -9

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Plz quick answer this is due tomorrow morning :(

Alex Ar [27]

Answer:

Binomial, The degree is 3, The coefficients are -8 & 5, and there are no constants

Step-by-step explanation:

6 0

3 years ago

Evaluate e^-2to one decimal place.

aleksklad [387]

$\bf ~~~~~~~~~~~~\textit{negative exponents}\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad 
a^n\implies \cfrac{1}{a^{-n}}\\\\
-------------------------------\\\\
e^{-2}\implies \cfrac{1}{e^2}$

plug that in your calculator, yes, your calculator has an [ e ], button for the Euler's constant.

4 0

3 years ago

John is driving at a constant speed of 40 miles per hour. How long does it take him to travel 50 miles?

asambeis [7]

Answer:

1 hour and 15 minutes

1.25 hr.

Step-by-step explanation:

40 miles ⇒ 1 hr.

50 miles ⇒ total hours

$\frac{50}{40}$ = 1.25 hours

7 0

3 years ago

Read 2 more answers

Determine translation

Mandarinka [93]

The translation moved point B(-5, -2) to B'(6, -5). Although a graph isn't necessary, it helps visualize what happened.

What happened to the x-coordinate of B? It changed from -5 to 6, an INCREASE of 11. So point B moved 11 units to the RIGHT.

What happened to the y-coordinate of B? It changed from -2 to -5, a DECREASE of 3. So point B moved 3 units DOWN.

5 0

3 years ago

Write the five term sequence that would represent each recursive rule f(x) = f(x-1) -7; f(2) = 12

barxatty [35]

Answer:

Required five terms of sequence are 19 , 12 , 5 , -2 and -9 .

Solution:

Need to find the five terms of the sequence.

Given recursive rule is f(x) = f(x-1) -7

Substituting x = 2 , f(2) = f(2-1)-7

= f(2) = f(1) – 7 ------(1)

Also given that f(2) = 12.

On substituting the given value of f(2) in eq (1) we get

12 = f(1) – 7

f(1) = 12 + 7 = 19

Using given recursive rule and given value of f(2) calculating f(3)

Substituting x = 3 ,

f(3) = f(3-1) – 7

= f(2) – 7

= 12 – 7

= 5

Using given recursive rule and calculated value of f(3) calculating f(4)

Substituting x = 4,

f(4) = f(4-1) – 7

= f(3) – 7

= 5– 7

= -2

Using given recursive rule and calculated value of f(4) calculating f(5)

Substituting x = 5,

f(5) = f(5-1) – 7

= f(4) – 7

= -2– 7

= -9

Hence required five terms of sequence are 19 , 12 , 5 , -2 and -9 .

8 0

3 years ago