MATHEMATICS MIDDLE SCHOOL

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Answer 1

Answer:

Answer:

Step-by-step explanation:

Answer 2

Answer:

Answer:

Step-by-step explanation:

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Eliott is 63 inches tall, which is 9 inches taller than his cousin,Jackson. Write and solve an addition equation to find Jackson's height
WHAT IS 4 TIMES TWO THIRDS IN A MIXED FRACTION
Sammy drew a rectangle that was w inches wide. The expression 2(2w) + 2(w) represents the perimeter of the rectangle that Sammy drew. Which statement relates the perimeter to the width of the rectangle? A) The perimeter is 6 inches more than the width. B) The perimeter is 6 times the width. C) The perimeter is 2 inches more than the width. D) The perimeter is 2 times the width.
Which decimals are less than –2.08?Choose all answers that are correct.A.–8.04B.–2.5C.–0.7D.3.16

There are 20 students in a math class who have brown hair. This represents 80 percent of the students in the class. Which equation can be used to find the total number of students in the math class? mc012-1.jpg mc012-2.jpg mc012-3.jpg mc012-4.jpg

Answers

x=total number of students.
80% of x=20
Therefore, the equaciton can be used to find the total number of students, in the math class is:
(80/100)x=20

We can solve this equation:
(80/100)x=20
x=(20*100)/80=25

Answer: the equation is (80/100)x=20 and its solutions is 25 students.

Answer:

The Answer is 25 students.

Step-by-step explanation:

In a department store a $40 dress is marked save 25% what is the discount?what is the sale price of the dress?

Answers

$percent\ time\ price:\n25\%*40=0,25*40=10\$\n\n40\$-10\$=30\$\n\nSale \ price\ is\ equal\ to\ 30\$.$

$40*.25=$10.00
$40-$10=$30
the dress cost $30

Duffy was analyzing the trajectory made after throwing a football. his coach was able to measure that his throw reached a maximum height of 18 feet after 2 seconds. he figured that the ball left his hand at a height of 5 feet. Let the independent variable represent time and the dependant variable represent height of the ball. Use this information to write an equation to model the path of the ball and predict when the ball will hit the ground the ball will hit the ground at approximately ________ seconds

Answers

Answer:

4.35 seconds.

Step-by-step explanation:

Let x represent the time the independent variable and y be dependent variable (height of the ball).

We are told that Duffy figured that the ball left his hand at a height of 5 feet. This means at x equals 0, y was 5 or initial height of ball is 5 feet.

We have been given that Duffy's coach measured that his throw reached a maximum height of 18 feet after 2 seconds. This means that at x equals 2 y was 18.

As point (2,18) represents maximum height of ball, so it will be vertex of parabola.

Since initial height of ball is less than maximum height, so our parabola will be downward opening and leading coefficient will be negative.

We know that vertex form of a downward opening parabola is in form: $y=-a(x-h)^2+k$

$y=-a(x-2)^2+18$

Let us find value of a using point (0,5).

$5=-a(0-2)^2+18$

$5=-a*4+18$

$5-18=-a*4+18-18$

$-13=-4a$

$(-13)/(-4)=(-4a)/(-4)$

$(13)/(4)=a$

Therefore, the equation $y=-((13)/(4))(x-2)^2+18$ can be used to find the height of ball after x seconds.

To find the time it will take the ball to hit the ground, we will substitute y equals 0 in our equation.

$0=-((13)/(4))(x-2)^2+18$

$0-18=-((13)/(4))(x-2)^2+18-18$

$0-18=-((13)/(4))(x-2)^2$

$-18*((4)/(13))=-(x-2)^2$

$(72)/(13)=(x-2)^2$

Taking square root of both sides of our equation we will get,

$\sqrt{(72)/(13)}=x-2$

$x-2\pm 2.35339$

$x-2=2.35339\text{ (or) } x-2=2.35339$

$x-2+2=2.35339+2\text{ (or) } x-2+2=-2.35339+2$

$x=4.35339\text{ (or) } x=-0.35339$

$x\approx 4.35\text{ (or) } x\approx -0.35$

Since time can not be negative, therefore, the ball will hit the ground approximately after 4.35 seconds.

What is the rule of the following input-output table?in out
3/2 1
5 3 1/3

* they are fractions

Answers

input 3/2, output 1 input 5, output is 3 and 1/3 convert 3 and 1/3 to mixed for fun 3 and 1/3=10/3 3/2 outputs 1 5, output 10/3 3/2 times 2/3=1 lets try with 5 5 times 2/3=10/3 correct the rule is f(x)=(2/3)x aka y=(2/3)x

X=5y graph the linear equation by finding and plotting its intercepts

Answers

X = 5y
5y = X
y = X/5
y = 1/5 X + 0

So the y-intercept is 0, meaning that both intercepts are the same, at (0,0). However, there is a slope in the equation (1/5), meaning the rise is 1, and the run is 5, so the next point on the line is (5, 1), and then (10,2), and so on. Hope this helps!

After his paycheck, Mr.Weber's credit card balance was $245.76. His payment was for $75.00. Write and solve an equation to find the amount of his credit card bill.

Answers

245.76=75.00+n

245.76
- 75.00
----------------
170.76

n=$170.76

$245.76 = $75.00 + n
We are subtracted both side by 75.00 because when we write equation the sign with the front of 75.00 is positive the positive opposite is negative thats why we subtract it and n equal to 170.76.
245.76 = 75.00 + n
-75.00 = -75.00
--------------------------
170.76 = n

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