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Darya [45]
3 years ago
7

A toy store sells either small dolls or large dolls. If one person buys 6 small dolls and 5 large dolls and spends $65, and anot

her person buys 5 small dolls and 4 large dolls and spends $53, how much does each type of dolls cost?
Mathematics
2 answers:
VARVARA [1.3K]3 years ago
7 0
6 small dolls + 5 large dolls = $65<em> ------------------ (1) </em>
5 small dolls + 4 large dolls = $53 <em>------------------ (2)</em>

<em>(1) x 5 : </em>30 small dolls + 25 large dolls = $325<span> <em>------------------ (1a)</em></span><em> </em>
<em>(2) x 6 : </em>30 small dolls + 24 large dolls = $318<em> ------------------ (2a)</em>

<em>(1a) - (2a) :</em> 1 large doll = $7

<em>Substitute 1 large doll = $7 into (1):</em>

6 small dolls + 5(7)  = $65
6 small dolls + 35  = $65
6 small dolls = $65 - $35
6 small dolls = $30
1 small doll  = $5

Answer: 1 small doll is $5 and I large doll is $7.




FrozenT [24]3 years ago
5 0
Each small doll cost 6.5 dollars and each large doll cost 10 dollars
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Answer:

-1

Step-by-step explanation:

You can write it as...

x^{2} -5=4x

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x^{2} -4x-5=0

Then use the quadratic formula to solve, since you want to find the negative solution, you don't need to find the positive solution, so we will have

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8 0
3 years ago
2. f(x)=4x+1 and ​g(x)=x2−4x−5​, find ​(g◦​f)(4​).
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Answer:

(g · f)(4) = 45

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(g · f)(4) = 4(4² - 5) + 1

Following pemdas

(g · f)(4) = 4(16 - 5) + 1

(g · f)(4) = 4(11) + 1

(g · f)(4) = 44 + 1

(g · f)(4) = 45

8 0
1 year ago
What is the domain of the function f(x) = 2x + 5?
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CHOICE B.

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Step-by-step explanation:

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