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Molodets [167]
3 years ago
13

14. Lara bought gift cards to give as gifts. She bought some $20 movie

Mathematics
2 answers:
lubasha [3.4K]3 years ago
7 0

Answer:

21

Step-by-step explanation:

The x intercept is represented by the coordinate (x,0) on x axis.

So, to find the x intercept ,we need to equate y=0 in the equation 20x+70y=420

=> 20x+ 70*0=420

=> x=420/20 =21.

x intercept is (21,0).

vovikov84 [41]3 years ago
3 0

Answer:

21

Step-by-step explanation:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

20*X+70*Y-420=0

Pull out like factors :

20x + 70y - 420  =   10 • (2x + 7y - 42)

Equation of a straight line:

y=mx+b

2x+7y-42  = 0

y-intercept = 42/7  =  6

x-intercept = 42/2  =  21

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Which number produces an irrational number when multiplied by 1/2
Ludmilka [50]

Quick answer

Any irrational number. I can't think of any exception to this statement.

sqrt(5) is irrational.  1/2 * sqrt(5) is still irrational.

-sqrt(5) is irrational. -1/2 * sqrt(5) is still irrational

2 + sqrt(5) is irrational. Multiplying this by 1/2 is still irrational.

1/2(2 + sqrt(5) = 1 + 1/2 * sqrt(5) ) is irrational.

Conclusion

There are no exceptions to this.  All irrational numbers produce irrationals when multiplied by 1/2

8 0
3 years ago
What is the solution of 2x-y=9
Sedaia [141]
<span>Simplifying 2x + -1y = 9 Solving 2x + -1y = 9 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'y' to each side of the equation. 2x + -1y + y = 9 + y Combine like terms: -1y + y = 0 2x + 0 = 9 + y 2x = 9 + y Divide each side by '2'. x = 4.5 + 0.5y Simplifying x = 4.5 + 0.5y

Hope this helps :)

~I tried to space it out so it wont look like a bunch of mess scrambled up xD~</span>
7 0
3 years ago
Michelle has $1,393 in a savings account. The interest rate is 9%, compounded annually.
suter [353]

A = P (1 + r)^n      where P = initial amount, r = interest rate , n = number of years and A = amount after n years.

So here we have A = 1393(1 + 0.09) ^ 2                 ( 0.09 = 9%)

=  $1655.02      (answer)

3 0
3 years ago
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givi [52]

Step-by-step explanation:

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3 years ago
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zysi [14]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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