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fenix001 [56]
3 years ago
7

Gabriel was out at a restaurant for dinner when the bill came. His dinner came to $20. After adding in a tip, before tax, he pai

d $23. Find the percent tip.
Mathematics
1 answer:
swat323 years ago
4 0

Answer:

Step-by-step explanation: I think it is three percent

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Solve this equation. <br> Leave the answer as an improper fraction. <br> 3x^2 + 2 = 11 - x^2
Nikolay [14]

Answer:

x = \frac{3}{2}orx=-\frac{3}{2}

Step-by-step explanation:

The given Equation is

3x^{2} + 2 = 11-x^{2}   .................(i)

Adding ( x^{2} -11 ) on both sides of  (i)

3x^{2}+2+x^{2}-11 = 11-x^{2}+x^{2}-11

solving and cancelling out the terms will give

⇒ 4x^{2} -9=0  

⇒ (2x)^{2} -(3)^{2} = 0     ...................(ii)

Now we Know that

(a)^{2} -(b)^{2} = (a-b)(a+b)  

Applying this on equation (ii)

(2x-3)(2x+3)=0

This will lead us to

Either 2x-3 =0    .......(iii)        or     2x+3=0   ..........(iv)

Solving equation (iii) for value of x

2x - 3 =0

adding 3 on both sides

2x -3 +3 = 0+ 3

2x = 3

Cross multiplying gives

x=\frac{3}{2}

Solving equation (iv) for value of x

2x + 3 =0

adding -3 on both sides

2x -3 +3 = 0- 3

2x = -3

Cross multiplying gives

x=\frac{-3}{2}

so x=\frac{3}{2} and x=\frac{-3}{2}

7 0
3 years ago
Twelve packs of paper cost $7.20. Of each pack costs the same, how much does one pack cost?
White raven [17]
Each pack costs $1.66 dollars
5 0
3 years ago
Read 2 more answers
Given that sec x - tan x=1÷4<br><br>​
solniwko [45]

Answer:Let =tan2

t

=

tan

⁡

x

2

, then cos=1−21+2

cos

⁡

x

=

1

−

t

2

1

+

t

2

and tan=21−2

tan

⁡

x

=

2

t

1

−

t

2

.

Now

1+21−2+21−2(1+)21−21+1−tan2

Step-by-step explanation:

5 0
3 years ago
How do you write 3 2/4 as a fraction greater t hff an 1
elena55 [62]

Answer:


Step-by-step explanation:

Hope this helps  3 over 4 hope this helps

3 0
3 years ago
For the following geometric sequence find the explicit formula. {12, -6, 3, ...}
Furkat [3]
X divide by -2

this is your formula

x/ (-2)

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