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tester [92]
3 years ago
11

Miranda and Luci went out to dinner. They each ordered the same sandwich and drink, and they left the same amount of tip. Howeve

r, Miranda got a desert for $2.95, and Luci did not get a desert. Miranda tipped 15%, and Luci tipped 20%. Write an equation that can be used to find the cost of the sandwich and drink. How much did the sandwich and drink cost?
Mathematics
1 answer:
dlinn [17]3 years ago
8 0
Use p for the price of the sandwich and drink. 
(p+ 2.95 x.15) + (p x .20)


(I JUST GUESSED. IM VERY DUMB, SO DO NOT TRUST THIS ANSWER.
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When June sits down today to read she notices she is on page 20 of a 200 page book. She decides to read 4 pages of this book eve
Olegator [25]
The answer is b. 60 || 4x10=40, 40+20=60
5 0
3 years ago
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Elza [17]

Answer:

x=20

Step-by-step explanation:

just use the pythagorean theorem!!

square 12 and 16 to get 144 and 256

add those together to get 400, and then just take the square root of 400 (which is 20)

this means that x=20!

hope this helps!! :)

6 0
3 years ago
Find the constant $a$ such that\[(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28.\]
Colt1911 [192]

The value of constant a is -5

Further explanation:

We will use the comparison of co-efficient method for finding the value of a

So,

Given

(x^2 - 3x + 4)(2x^2 +ax + 7)\\= x^2((2x^2 +ax + 7)-3x((2x^2 +ax + 7)+4(2x^2 +ax + 7)\\= 2x^4+ax^3+7x^2-6x^3-3ax^2-21x+8x^2+4ax+28\\Combining\ alike\ terms\\=2x^4+ax^3-6x^3+7x^2-3ax^2+8x^2-21x+4ax+28\\= 2x^4 +(a-6)x^3+(15-3a)x^2-(21-4a)x+28\\

As it is given that

(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28

In this case, co-efficient of variables will be equal, so we can compare the coefficients of x^3, x^2 or x

Comparing coefficient of x^3

a-6 = -11\\a = -11+6\\a = -5

So the value of constant a is -5

Keywords: Polynomials, factorization

Learn more about factorization at:

  • brainly.com/question/1414350
  • brainly.com/question/1430645

#LearnwithBrainly

4 0
3 years ago
There are 5 radar stations and the probability of a single radar station detecting an enemy plane is 0.55. What is the probabili
Lerok [7]
This is a binomial distribution with n = 5, p = 0.55, q = 1 - 0.55 = 0.45, x = 0, 1, 2, 3

P(x) = nCx p^x q^(n - x)
P(x ≤ 3) = 1 - P(x > 3) = 1 - [P(4) + P(5)]
P(4) = 5C4 x (0.55)^4 x (0.45) = 0.2059
P(5) = 5C5 x (0.55)^5 x 1 = 0.0503

P(x ≤ 3) = 1 - (0.2059 + 0.0503) = 1 - 0.2562 = 0.7438
4 0
3 years ago
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Mashutka [201]

Answer:

The answer is 7

Step-by-step explanation:

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4 0
2 years ago
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