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Vlada [557]
2 years ago
6

Carla and Rob left a 20% tip after having lunch at a restaurant. The amount of the tip was $6. Carla's lunch cost $15. Write an

equation you can use to find x, the cost of Rob's lunch.
Mathematics
1 answer:
Afina-wow [57]2 years ago
4 0

Robs lunch cost is unknown = x

and we know carla's cost 15  = 15

x + 15 = total lunch cost

now me know 20% is 6

so 20% of total lunch cost is 6

or

(x+15)(.02)  which is 20% of lunch and this is 6

or

(x+15)(.02) = 6  this is the equation to find x

this is the answer, but for kicks lets solve it to to find the cost

.2x + 3 = 6

     - 3    -3  

.2x  = 3

/.2     /.2

x = 15

Robs lunch cost $15 too


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At which of the following points do the two equations f(x)=3x2+5 and g(x)=4x+4 intersect?
Basile [38]

Answer:

(\frac{1}{3}, \frac{16}{3} ) and (1, 8 )

Step-by-step explanation:

To find the points of intersection equate f(x) and g(x), that is

3x² + 5 = 4x + 4 ( subtract 4x + 4 from both sides )

3x² - 4x + 1 = 0 ← in standard form

(3x - 1)(x - 1) = 0 ← in factored form

Equate each factor to zero and solve for x

3x - 1 = 0 ⇒ 3x = 1 ⇒ x = \frac{1}{3}

x - 1 = 0 ⇒ x = 1

Substitute these values into either of the 2 functions for corresponding y- coordinates.

Substituting into g(x), then

g(1) = 4(1) + 4 = 4 + 4 = 8 ⇒ (1, 8 )

g(\frac{1}{3} ) = \frac{4}{3} + 4 = \frac{16}{3} ⇒ (\frac{1}{3}, \frac{16}{3} )

3 0
3 years ago
Can u please help me solve? I'm reviewing for finals.
Black_prince [1.1K]

Given:

Consider the given graph as a reference of the solution.

To find:

-3(u\cdot v)

Explanation:

By analyzing the graph, we can define the coordinate of vector u and v:

\[\begin{align} & \vec{u}=(-8,-9)-(0,0)=(-8,-9) \\  & \vec{v}=(3,7)-(0,0)=(3,7)\end{align}\]

Now, let perform the dot product of two vectors,

\begin{gathered} u\cdot v=(-8,-9)\cdot(3,7) \\ u\cdot v=(-8)(3)+(-9)(7) \\ u\cdot v=-24-63 \\ u\cdot v=-87 \end{gathered}

Now, perform the required operation,

\begin{gathered} -3(u\cdot v) \\ =-3(-87) \\ =261 \end{gathered}

Final answer:

Hence, the required solution is:

-3(u\cdot v)=261

8 0
11 months ago
A group of 12 students is deciding whether to go to the science center or the zoo. Science center tickets are 3 for $36.75 and z
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ANSWER:

$6

ExPLANATION:

Step 1:

36.75 × 4 = 147

Step 2:

51 × 3 = 153

Step 3:

153 - 147 = 6

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3 years ago
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Lady_Fox [76]

Answer:

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(0.5, 5) (1, 10) (1.5, 15) (2, 20) (2.5, 25)

Question 3 is the same thing but the slope is now 2. Then you would have to pin the points as...

(1, 2) (2, 4) (3, 6) (4, 8) (5, 10)

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Which number produces an rational number when multiplied by 1/5
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Answer:

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Step-by-step explanation:


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