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3 years ago

(1) Mr. Rawlins took a quiz with 12 problems and he got 10 of them right. What percentage of the quiz did he get correct? *

Mathematics

2 answers:

elena-s [515]3 years ago

5 0

Answer:

83.33%

Step-by-step explanation:

s344n2d4d5 [400]3 years ago

5 0

Answer:

83.33%

Step-by-step explanation:

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Hhhhhhhhhhhheeeeeeeeeelllllpppppppppp me

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Answer:

m<b=107º

Step-by-step explanation:

180-41-32=107

D and B are congruent

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3 years ago

Find the x-intercept for 11x - 33y = 99

photoshop1234 [79]

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3 years ago

Find the quadratic function that fits the following data. which one function fits.

Oksana_A [137]

Answer:

Step-by-step explanation:

The general rule for the quadratic function is

$y=ax^2+bx+c$

Use the data from the table:

$y(50)=130\Rightarrow 130=a\cdot 50^2+b\cdot 50+c\\ \\y(70)=130\Rightarrow 130=a\cdot 70^2+b\cdot 70+c\\ \\y(90)=200\Rightarrow 200=a\cdot 90^2+b\cdot 90+c$

We get the system of three equations:

$\left\{\begin{array}{l}2500a+50b+c=130\\ \\4900a+70b+c=130\\ \\8100a+90b+c=200\end{array}\right.$

Subtract these equations:

$\left\{\begin{array}{l}4900a+70b+c-2500a-50b-c=130-130\\ \\8100a+90b+c-2500a-50b-c=200-130\end{array}\right.\Rightarrow \left\{\begin{array}{l}2400a+20b=0\\ \\5600a+40b=70\end{array}\right.$

From the first equation

$b=-120a$

Substitute it into the second equation:

$5600a+40\cdot (-120a)=70\Rightarrow 800a=70,\\ \\ a=\dfrac{7}{80},\\ \\ b=-120\cdot \dfrac{7}{80}=-\dfrac{21}{2}=-10.5$

So,

$2500\cdot \dfrac{7}{80}+50\cdot (-10.5)+c=130\Rightarrow 218.75-525+c=130\\ \\c=130-218.75+525=436.25$

The quadratic function is

$y=\dfrac{7}{80}x^2-10.5x+436.25\\ \\y=0.0875x^2-10.5x+436.25$

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3 years ago

5x and 7x? are like terms<br> True<br> Or False

Serjik [45]

Answer:

True

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Please answer my question

Brrunno [24]

ANSWER:

It is letter B. because plus the 7 and 2= 9 and we cant see a whole number so it dosent have 1 so I am very sure about my answer

3 0

3 years ago