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adell [148]
3 years ago
12

Quanto é três x ao quadrado menos sete x mais dois e igual a zero ?

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
3 0
3x² - 7 x 2 ? É isso ? 
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Start of Questions The admission fee at an amusement park is $5.00 for children and $6.00 for adults. On a certain day, 314 peop
Greeley [361]

Answer:

144 children and 170 adults

Step-by-step explanation:

make 2 equations

make :

the children as the regarded as the variable : x

the adults are the regarded as the variable  : y

<em>5x + 6 y = 1740</em>

<em>x + y = 314</em>

<h3><u>solve this by the method of elimination </u></h3>

5x + 6y = 1740

5(x + y = 314)

= 5x + 5y = 1570

5x + 6y = 1740

5x + 5y = 1570

the 5x is cancelled out

6y - 5y = 1740 - 1570

y = 170

now replace the value of y in the eqaution

5x + 6 (170) = 1740

5x =720

x = 144

hence they were 144 children and 170 adults

mark as brainiest

3 0
3 years ago
Read 2 more answers
Stephen's lunch bill is currently at $8.33. Stephen orders a fruit salad for take-out, and wants to leave $2.25 as a tip for his
Salsk061 [2.6K]

Answer:

$1.53

Step-by-step explanation:

The computation of the change in the bill is shown below:

Total money he has to pay is

= $8.33 + $2.25

= $13.47

And, he have  

= $10 + $5

= $15

So, the change would be

= $15 - $13.47

= $1.53

6 0
3 years ago
Solve the proportion <br> 7/5=x/3
kumpel [21]

Start with

\dfrac{7}{5}=\dfrac{x}{3}

Multiply both sides by 3:

\dfrac{21}{5}=x

Recall that 21/5=4.2 to claim the correct answer.

6 0
3 years ago
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Write a problem that can be solved by dividing 9/10 by 1/4
exis [7]

Answer:

Step-by-step explanation:

8 0
3 years ago
Suppose an annuity pays 6% annual interest, compounded semi-annually. You invest in this annuity by contributing $4,500 semiannu
yaroslaw [1]

Answer:

$3240

Step-by-step explanation:

hope it is well understood

5 0
3 years ago
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