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tiny-mole [99]
3 years ago
15

What is the algebraic expression for this; the value in cents of an unknown number of dimes

Mathematics
1 answer:
Murrr4er [49]3 years ago
8 0

Answer:

X dimes= 10 * X cents

Step-by-step explanation:

Let us suppose that We have X number of dimes

Now from Monetary rules we know that

1 dime = 10 cents  ............(i)

Now if we will have

2 dime = 20 cents

2 dime = 2 * 10 cents  .....(ii)

from (i) and (ii) we see that if we have X dimes then

X dimes= 10 * X cents

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Xis directly proportional to y.
OleMash [197]
X = k x y
21 = k x 3
k = 7
x = 7y

x = 7(10)
x = 70
6 0
3 years ago
The cost of 2 plates of spaghetti & 1 plate of salad is $27.50. The cost for 4 plates of spaghetti & 3 salads is $59.50.
k0ka [10]

2a+1b=27.50

4a+2b=59.50

Multiply first equation by -4 and the second by 2 so you can drop off the a values then add the equations together.  Then solve for b.  You should get b=6.

Then plug b into one of the original equations and solve for a and you should get 10.75

So a plate of spaghetti is $10.75 and a salad is $6.

<em><u>Please mark brainliest!</u></em>

8 0
2 years ago
3x+5y-4=0<br> what is the slope and y-intercept?
zaharov [31]

Answer:

3x + 5y - 4 = 0 \\ 3x + 5y = 4 \\ 5y = 4 - 3x \\ y =  \frac{4}{5}  -  \frac{3}{5} x \\ y = mx + c \\ slope = m =  \frac{ - 3}{5}  \\ y \: intersept = c =  \frac{4}{5}  \\ thank \: you

5 0
2 years ago
Saul has 130 baseball cards. How many bags of 10 baseball cards does he need to get so that he will have 200 baseball cards in a
kolezko [41]

Answer:

6 bags of baseball cards

Step-by-step explanation:

3 0
2 years ago
What quadratic has roots x=8 and x= -5
Alona [7]

Answer:

So the correct option is X squared -3 X +40

Step-by-step explanation:

If a polynomial has roots x=8 and x=-5, then we know that the factorized form is:

(x-8)(x+5)

So, to find the polynomial we need to expand the polynomials:

(x-8)(x+5) = (x^2 +5x - 8x + 40) = x^2 -3x + 40

5 0
2 years ago
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