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Papessa [141]
3 years ago
6

On a test, Alice had 80% of the problems right. If she had

Mathematics
2 answers:
Natasha_Volkova [10]3 years ago
7 0

Answer: she would get 100%

Step-by-step explanation: every correct question u get 5 points so 20 * 5 = 100

s2008m [1.1K]3 years ago
3 0

Answer:

25

Step-by-step explanation:

80% = 0.80

0.80x = 20

0.80x/0.80 = 20/0.80

x = 25

So there was 25 questions on the test

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36/48 in simplest form?
Fantom [35]
36/48 = 6/8 = 3/4


reduced by 6 and then again by 2
3 0
4 years ago
I DONT UNDERSTAND THIS AT ALLLL :´)
creativ13 [48]

Step-by-step explanation:

2.50x+3.00y=?

x=8 y=11

4 0
3 years ago
Read 2 more answers
Determine the type and number of solutions of 4x^2-5x+1=0.
Arlecino [84]
<span>4x² - 5x + 1 = 0
a = 4; b = - 5, c = 1
</span>Δ = b² - 4.a.c
Δ = (-5)² - 4.4.1
Δ = 25 - 16
Δ = 9
<span>
x = - b </span>± √Δ / 2.a
x =  \frac{-5\± \sqrt{9} }{2*4}
x =  \frac{-5\±3}{8}
x' =  \frac{-5-3}{8} =  \frac{-8}{8} = -1
x' = \frac{-5+3}{8} = \frac{-2}{8} (\div2) = \frac{-1}{4}


A. Two real solutions (x' = -1 and x'' = -1/4)
4 0
3 years ago
Write an equation for a function that has vertical asymptotes at x=3 &amp; x=-10
stepan [7]

Answer:

\frac{5}{ {x}^{2}   + 7x - 30}

Step-by-step explanation:

We can write a rational function.

We need to make sure our denominator both have zeroes at 3 and 10.

Set an equation equal to zero to find the function

0 - x = 3

0 - x =  - 10

0 - ( - 3) =  = 3

0 - 10 = 10

So we would represent that's as

x - 3

and

x + 10

Multiply the two binomial together.

(x - 3)(x + 10) =  {x}^{2}  + 7x  - 30

Let our numbetator be any interger.

Use any equation as long as the quadratic is the denominator and the interger is the numerator.

\frac{5}{ {x}^{2} + 7x - 30 }

7 0
3 years ago
You are choosing between two different cell phone plans. The first plan charges a rate of 24 cents per minute. The second plan c
Virty [35]

Answer: 286 minutes

Step-by-step explanation:

x : # of months that has gone by

0.24x : cost of the 24 cent plan after "x" minutes

39.95 + 0.10x : cost of the 10 cent plan after "x" minutes

1. 39.95 + 0.10x > 0.24x

2. 39.95 > 0.24x - 0.10x

3. 39.95 > 0.14x

4. 285.36 > x

x must be AT LEAST 286 minutes for plan #2 (39.95 + 0.10x) to be a better deal

7 0
3 years ago
Read 2 more answers
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