3 years ago

A) 120 + 84 – 3x 10 =

Mathematics

1 answer:

FrozenT [24]3 years ago

7 0

Answer:

2010

Step-by-step explanation:

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Jeune see earnedb $725 dollars by working 5 days a week. What is the average amount that she earned per day?

nika2105 [10]

To get the mean or average.
You divide 725 from 5.
725/5 = 145
Her average is $145 per day.

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3 years ago

Find the product and sum of the roots of the equation:<br> 2x^2-9x-10=0

BabaBlast [244]

Answer:

<h3> sum of the roots: $x_1+x_2=4\frac12$ </h3><h3> product of the roots: $x_1x_2=-5$ </h3><h3> Step-by-step explanation:</h3>

$2x^2-9x-10=0\quad\implies\quad a=2\,,\ b=-9\,,\ c=-10$

$b^2-4ac=(-9)^2-4(2)(-10)=81+80=161>0$

From Vieta's formulas applied to quadratic polynomial we have:

if $b^2-4ac\geqslant0$ then

sum of roots: $x_1+x_2=-\dfrac ba=-\dfrac{-9}2=4\frac12$

product of the roots: $x_1x_2=\dfrac ca=\dfrac{-10}2=-5$

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3 years ago

Katherine went to Hibbet sports and spent $125.50 on a pair of shoes and $12.25

Sergio039 [100]

Answer:

1. $137.75

3. $149.15

Step-by-step explanation:

12.25+125.50=137.75

3. 8.25% of 137.75= 11.4

137.75+11.4=149.15

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2 years ago

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Reuben has scores of 70,75,83, and 80 on four spanish quizzes. what score must he get on the next quiz to achieve an average of

Sergio [31]

X - the score he must get

$\frac{70+75+83+80+x}{5} \geq 80 \\
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He must get at least 92 points.

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3 years ago

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fenix001 [56]

Sort{17} which equals 4.123

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3 years ago