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9966 [12]
4 years ago
13

Kendra owns a restaurant. She charges $3.00 for 2 eggs and one piece of toast, and $1.80 for one egg and one piece of toast. How

much does Kendra charge for an egg? A piece of toast? .
A. $1.20 per egg;
$.60 for toast
B. $.60 per egg; $1.20 for toast
C. $.60 per egg; $.60 for toast
D. $1.20 per egg; $1.20 for toast
Mathematics
1 answer:
ankoles [38]4 years ago
7 0
Answer = A.
Set up your equation, then switch the variables with numbers to find which one works.
2x + y = 3; 2(1.2) + .6 = 3
x + y = 1.8; 1.2 + .6 = 1.8


 
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% change = (new value - old value)/(old value) * 100%
.. = (9.67 -9.74)/9.74 * 100%
.. = -0.07/9.74 * 100%
.. = -0.7%

The decrease is 0.7%.
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katrin2010 [14]
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How do you solve systems of equations using matrices? I need help with the steps please
seraphim [82]
The objective function is simply a function that is meant to be maximized. Because this function is multivariable, we know that with the applied constraints, the value that maximizes this function must be on the boundary of the domain described by these constraints. If you view the attached image, the grey section highlighted section is the area on the domain of the function which meets all defined constraints. (It is all of the inequalities plotted over one another). Your job would thus be to determine which value on the boundary maximizes the value of the objective function. In this case, since any contribution from y reduces the value of the objective function, you will want to make this value as low as possible, and make x as high as possible. Within the boundaries of the constraints, this thus maximizes the function at x = 5, y = 0.

6 0
3 years ago
Can someone help I’m not good with word problems
pickupchik [31]

Answer:

I agree that this question can be confusing:

Apparently point A and point B must be on the same straight line (measured from the light house or the question would be nonsensical)

tan 13 = H / DA      where H is height of lighthouse

tan 8 = H / DB       tangent measured from point B

tan 13 / tan 8 = DB / DA

DB = .2309 / .1405 * 1279 = 2101 ft

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3 years ago
What are the values of x in the equation 4x^2+4x-3=0
ludmilkaskok [199]
I have an answer and an explanation!

ANSWER:X=\frac{1}{2}   (or) x= \frac{-3}{2}


Explanation:

<span>{Let's solve your equation step-by-step.}
</span>4 x^{2} +4x-3=0

<span>{Step 1: Factor left side of equation.}
</span>(2x-1)(2x+3)=0

{<span>Step 2: Set factors equal to 0.}
</span>2x-1=0 (or) 2x+3=0<span>
</span>
3 0
3 years ago
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