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n200080 [17]
3 years ago
14

MAATTHHH HELP PLEASEE I REALLY NEED HELP WILL GIVE 5 STARS SAY THANKS AND MARK AS BEST ANSWER

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
6 0
C
c
b
hope this helps if nor still give five stars
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solve this word problem leading to quadratic equation: the area of a rectangle is 60cm². The length is 11cm more than the width.
morpeh [17]

Answer:

Step-by-step explanation:

let : x The length and y the width you have this system :

xy =60....(1)

x = y+10...(2)

put the value for x in (1):  (y+10)y =60

the quadratic equation is : y² +10y - 60 = 0

Δ =b² - 4ac        a = 1        b= 10      c= - 60

Δ =10² - 4(1)(-60) = 324 =18²

y 1 = (-10-18)/2 negatif...... refused

y 2 = (-10+18)/2 =4

the width is 4

8 0
3 years ago
As x increases and y stays constant, z as y increases and x stays constant, zas x increases and z stays constant, y
Stells [14]

Consider z=\frac{x}{y}

(1) As x increases and y stays constant, z ______

(2) As y increases and x stays constant, z _____

(3) As x increases and z stays constant, y ______

Answer:

z=\frac{x}{y}

(1) As x increases and y stays constant, z increases

When y stays constant, z is directly proportional to x. So , as x increases the z also increases.

(2 ) As y increases and x stays constant, z decreases.

When x stays constant, z is inversely proportional to y. So , as y increases the z decreases.

(3) As x increases and z stays constant, y increases

z=\frac{x}{y} (z stays constant)

So equation becomes y=\frac{x}{z}

When z stays constant, y is directly proportional to x. So , as x increases the y also increases.



6 0
3 years ago
− 16 = <br><br> please helllpppp
Mumz [18]

the answer is 16

Step-by-step explanation:

it's the opposite of a negative

5 0
3 years ago
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Evaluate √36<br> sorry Ф↔Ф
miss Akunina [59]

Answer:

The square root of 36 is 6.

Step-by-step explanation:

6*6=36

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3 years ago
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A​ student's course grade is based on one midterm that counts as 20​% of his final​ grade, one class project that counts as 20​%
Rus_ich [418]

Answer:

His overall final​ score is 80.1.

His letter grade is a B.

Step-by-step explanation:

To find his grade, we multiply each grade by it's weight.

Grades and weights:

His midterm score is 64​. The midterm counts 20% = 0.2.

His project score is 80​. The project score counts 20% = 0.2.

His homework score is 94. The homework score counts 30%.

His final exam score is 77. It counts 30%.

What is his overall final​ score?

64*0.2 + 80*0.2 + 94*0.3 + 77*0.3 = 80.1

His overall final​ score is 80.1.

What letter grade did he earn​ (A, B,​ C, D, or​ F)?

At least 80 but less than 90 is a​ B. He scored 80.1, so his letter grade is a B.

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3 years ago
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