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Zina [86]
3 years ago
15

Solve for x: 2eˣ - 7 = 21

Mathematics
1 answer:
zepelin [54]3 years ago
3 0

2eˣ - 7 = 21

2eˣ = 28

eˣ = 14 How do we isolate for x now? Well we know that aˣ=b can be converted to x=log_{a}(b).

x = log_{e}(14)   A shorthand for "log base e" is the natural log (ln).

x = ln(14)

x = 2.64 approx.

Exact answer: ln(14)

Approximation: 2.64

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pls help me with this if you know it also to explain it thanks Solve the equation -21 + 70n = 77 for n.
gogolik [260]

Answer:

n = 1 2/5

Step-by-step explanation:

-21 + 70n = 77

Add 21 to each side

-21+21 + 70n = 77 +21

70n = 98

Divide each side by 70

70n/70 = 98/70

n =98/70

n = 70/70 +28/70

n = 1 + 2/5

n = 1 2/5

6 0
4 years ago
The graph of the function f(x) = x2 + 8x + 12 is shown. Which statements describe the graph? Check all that apply.
strojnjashka [21]
<span>The axis of symmetry is x = –4.
</span><span>The domain is all real numbers.
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3 years ago
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What is 2 and 41/50 as a percent
Vitek1552 [10]
2 and 41/50 as a percent is 282%.
7 0
3 years ago
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Find the remainder when f(x) = x3 − 14x2 + 7x − 10 is divided by x − 3. 184 164 −88 −122
Fudgin [204]

Answer:

122

Step-by-step explanation:

For this case we must build a quotient that, when multiplied by the divisor, eliminates the terms of the divide until it reaches the remainder.

It must be fulfilled that:

Dividend = Quotient * Divisor + Remainder

we have that the remainder is 122.

have a good day

5 0
3 years ago
20% of dash is equal to 140M
AlexFokin [52]

ANSWER: The length of the entire dash is 700 meters.

EXPLANATION:

Because 20% of the dash equals 140 meters, we can use a variable to figure out the length of the entire dash.

Let x be the length of the entire dash.

.2x = 140\\\\x = 700

The length of the entire dash is 700 meters.

7 0
3 years ago
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