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GenaCL600 [577]
3 years ago
8

ASAP NEED HELP!!!!

Mathematics
1 answer:
alexira [117]3 years ago
4 0
A. X+Y=50 y=x+20

B. 50-x=x+20 x=15 minutes

C. No, We know however much time Ted spends on the butterfly he spends 20 mins more on breast stroke. If he spends 45 mins on butterfly then he must spend 45+20= 65 mins on breast stroke. BUT we already know that he only spends 50 mins total, so it’s not possible
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One car takes half a minute to complete a circuit.
Liono4ka [1.6K]

Answer:

7 laps

Step-by-step explanation:

5 0
3 years ago
Which of the following is a monomial ? 9/x 11x2 20x9-7x 20x -14
irakobra [83]

Answer: 11x^2

Step-by-step explanation:

I suppose that the options are:

a) 9/x

b) 11x^2

c) 20x^9-7x

d) 20x -14

First, a polynomial is something like:

aₙx^n + .... + a₂*x^2 + a₁*x^1 + a₀*x^0

Where n is the degree of the polynomial,  the therms a are the coefficients, and aₙ is the leading coefficient.

Depending on the number of terms of the polynomial, it takes different names.

If we have only one term, it is called a monomial, if it has two terms, it is called a binomial, and so on.

So if we want to find a monomial, then we need to look at the options with only one term.

The options with only one term are options a and b.

But option a is a quotient (we have a negative power of x: 9/x = 9*x^-1)

So this is not a polynomial, then the correct option is option b.

8 0
3 years ago
Determine whether the polynomial is a difference of squares and if it is, factor it.
ladessa [460]

Answer:

(y - 4)(y + 4)

Step-by-step explanation:

y² - 16 ← is a difference of squares

Since y² and 16 are both squares separated by a difference , that is minus

A difference of squares factors as

y² - 16

= y² - 4²

= (y - 4)(y + 4)

5 0
3 years ago
I need the side of length x and the answer should be the nearest hundredth
Firdavs [7]

Answer:

x = 15.49

Step-by-step explanation:

a2+b2=c2

11^2+x^2=19^2

121 =x^2 = 361

x^2 = 240

x = 15.49

7 0
2 years ago
Mitchell currently sells stoves for company a at a salary of $12,000 plus $150 commission for each stove he sells Company B offe
ipn [44]

Answer:

Mitchell needs to sell 120 stoves for the options to be equal.

Step-by-step explanation:

Company A gives Mitchell $12000 salary plus $150 commission per stove selling and Company B is offering Mitchell $24000 salary plus $50 commission per stove selling.

So, if Mitchell sells x number of stoves such that both the plans become equal, then we can write  

12000 + 150x = 24000 + 50x

⇒ 100x = 12000

⇒ x = 120

Therefore, Mitchell needs to sell 120 stoves for the options to be equal. (Answer)

5 0
3 years ago
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