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3 years ago

PLEASE HELP I WILL BRAINLIST

Mathematics

2 answers:

VladimirAG [237]3 years ago

6 0

Answer:

Well we know that it's a linear because it has a exponent so what we do to answer this question

Step-by-step explanation:

------

- b+ v. b2 -4ac

x= ____________

x2+ 12x +20 =0

a=1

b=12

c=20

_______

X= -12+v 12 2 -4 • 1 • 20

___________________

2•1

AlladinOne [14]3 years ago

3 0

Answer:

2; 10

Step-by-step explanation:

12/2 = 6

$(x+6)^{2}$ = $x^{2}$ +12x + 36

$x^{2}$ +12x + 20

- $x^{2}$ <u> +12x + 36</u>

0 + 0 - 16

$(x+6)^{2}$ - 16 = 0

$(x+6)^{2}$ = 16

x + 6 = $\sqrt{16}$

x = -4 + 6 = <u>2</u>

x = 4 + 6 = <u>10</u>

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Susan works as a tutor for $10 and hour, and as a waitress for $11 an hour. This month, she worked a combined total of 90 hours

uysha [10]

Answer:

$\$(990-t)$

Step-by-step explanation:

The correct question is

Susan works as a tutor for $10 and hour, and as a waitress for $11 an hour. This month, she worked a combined total of 90 hours at her two jobs. Let t be the number of hours Susan worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month

Let

t -----> the number of hours that Susan work as a tutor

y ----> the number of hours that Susan work as a waitress

z ---> the combined total dollar amount she earned this month

we know that

$t+y=90$

$y=90-t$ -----> equation A

we know that

The combined total dollar amount she earned this month is equal to the number of hours that Susan work as a tutor multiplied by $10 plus the number of hours that Susan work as a waitress multiplied by $11

$z=10t+11y$ ----> equation B