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dusya [7]
3 years ago
15

4^(x-1)+4^(x)+4^(x-1)=84

Mathematics
1 answer:
creativ13 [48]3 years ago
3 0

Answer:

7.66

Step-by-step explanation:

Just open the parenthesis.

4x-4+4x+4x-4=84

Now simplify and solve

12x-8=84

12x=92

x= 7.66

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Calculator
rodikova [14]

Solution:

<u>First, let's find the surface area of the triangular prism.</u>

  • 2(1/2 x 8 x 12) + 2(10 x 6) + (12 x 6) = Surface area of triangular prism
  • => (8 x 12) + 2(60) + (72) = Surface area of triangular prism
  • => (96) + 120 + 72 = Surface area of triangular prism
  • => 96 + 192 = Surface area of triangular prism
  • => 288 ft² = Surface area of triangular prism

<u>Now, let's find the surface area of the rectangular prism.</u>

  • 2(18 x 9) + 2(6 x 9) + 2(6 x 18)
  • => 2(162) + 2(54) + 2(108)
  • => 324 + 108 + 216
  • => 2(324) = 648 ft²

<u>Now, add both the surface areas to find the surface area of the figure.</u>

  • 288 + 648 = Surface area of figure
  • => 936 ft² = Surface area of figure

The surface area of the figure is 936 ft².

7 0
2 years ago
On a recent test in English Jorge scored 17 out of 20 points.His friend Ava has a different English teacher and scored 20 out of
qwelly [4]

Jorge did better on his test.

Step-by-step explanation:

It is difficult to say who scored better on the test because Jorge got less wrong but had less questions on his test, Ava got more wrong but has more questions but overall 17 out of 20 is a 85% when 20 out of 25 is 80%

4 0
4 years ago
A store regularly sells t-shirts for $12. during a sale, the shirts are discounted by 15%. what is the price of a t-shirt during
Bumek [7]
$12*85%(the amount of the regular price that you pay)= <span>10.20 </span>
5 0
4 years ago
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
BabaBlast [244]

Answer: 8

Step-by-step explanation:

Pythagorean theorem - a^2+b^2=c^2

a^2+15^2=17^2

a^2+225=289

(subtract 225 from both sides)

a^2=64

(sq root both sides)

a=8

6 0
3 years ago
What’s the mathematical expression for “five times x is fewer than 12”
Musya8 [376]

Answer:

5x<12

Step-by-step explanation:

Five times x is equally 5x fewer than is equally < # 5x<12

3 0
3 years ago
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