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Fed [463]
3 years ago
14

Three times antonios age plus 2 times sarahs equals 14. sarahs age is also twice antonios age. how old is sarah

Mathematics
1 answer:
zubka84 [21]3 years ago
8 0
Sarah is 4 years old
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Which proportion is equivalent to a/b = c/d
PilotLPTM [1.2K]
The proportion equal to a/b = c/d is A.) A/C = B/D

We will know if a proportion is equivalent when its cross products are equal.

a/b = c/d where ad = bc

since ad = bc, a/c = b/d

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What’s the answer to 34=-2(1–9x)
vaieri [72.5K]

Your answer would be x=2

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Factor 2s^3-27-18s+3s^2 by grouping
a_sh-v [17]
(2s+3)(s+3)(s-3)-----------
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3 years ago
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Suppose that the probabilities of a customer purchasing​ 0, 1, or 2 books at a book store are 0.2​, 0.3​, and 0.5​, respectively
svetlana [45]

Answer:

Expectation number of books a customer will​ purchase  =  1.3

Step-by-step explanation:

x     :​ 0      1              2

p(x) :0.2​,  0.3​, and 0.5​

Expectation

E(X) = ∑x P(x)

      = 0 X 0.2 +1 X 0.3+ 2 X 0.5

     = 1.3

Expectation  E(X) =  1.3

Expectation number of books a customer will​ purchase  =  1.3

3 0
3 years ago
Estimate the solution to the following system of equations by graphing.
Mars2501 [29]

Solution of 9x+8y=26 and 3x+2y=9 are given by \mathbf{x=\frac{10}{3},y=-\frac{1}{2}}.

We have to plot the graphs of the given two lines or curves, then we have to find the intersection point(s) of the curves or lines. That point is the solution for the system of the equations.

Given equations are,

9x+8y=26 .................(1)

3x+2y=9 ...................(2)

Now multiplying 3 with (2) and then subtracting (1) from that we get,

3(3x+2y)-(9x+8y)=3\times9-26\\\Rightarrow9x+6y-9x-8y=27-26\\\Rightarrow-2y=1\\\Rightarrow y=\frac{-1}{2}

Substituting the value of y in (1) we get,

9x+8\times\frac{-1}{2}=26\\\Rightarrow9x-4=26\\\Rightarrow9x=26+4\\\Rightarrow x=\frac{30}{9}=\frac{10}{3}

Also if we draw the graphs of the given equations by using graphing calculator we get,

Here in the graph we can see that the lines represented by the given equations intersects each other at point \left(\frac{10}{3},-\frac{1}{2}\right).

Hence the solution is x=\frac{10}{3},y=-\frac{1}{2}.

Learn more about System of equations here -

brainly.com/question/1365672

#SPJ10

4 0
1 year ago
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