MATHEMATICS MIDDLE SCHOOL

Find the experimental probability that the first three students to arrive at school are boys.A.3/20
B.1/5
C.3/10
D.1/4

Answers

Answer 1
Answer: How many people are in the school

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PLZ HELP!! Johnny rode his bike 4/7 of a mile from his house to the lake on a straight path. Then, he turned around and rode his bike 3 1/8 miles in the opposite direction. About how far is Johnny from his house? A. 1 1/2 milesB. 2 milesC.2 1/2 milesD. 3 miles
Zuri made 2 spheres using plaster. The smaller sphere has a radius of 6 cm. The larger sphere has a radius of 24 cm.How much more plaster did Zuri use for the larger sphere?Use 3.14 to approximate pi and express your answer in hundredths.cm3
Look at the following sequence: 729,243,81,27... What is the next term?
What is the take from ten strategy
A new pencil is 19 centimeters long. Levi uses it for a month. The pencil now measures 8 centimeters.The pencil is centimeters shorter now than when it was new.

What is y ? and how do you get it ?

Answers

you first do the opposite of what 4 is. so subtract on both sides. next since y is already being divided by 5 you need to do the opposite which is multiplying. so multiply on both sides and your answer will be y=60

Willa is building birdhouses. Each side of the birdhouse will need 9 nails. How many nails does Willa need for each birdhouse? There are 7 sides on the birdhouse. If Willa uses only 7 nails on each side, how will the total number of nails she uses change?

Answers

The total number of nails will decrease by 14 when Willa will use 7 nails on each side.

Step-by-step explanation:

Sides of one birdhouse = 7

Nails used on each side = 9

Nails used on one birdhouse = No. of sides * Nails used for each side

Nails used on one birdhouse = 7*9 = 63 nails

If she uses 7 nails on each side, then the number of nails used on each birdhouse will be;

No. of nails = 7*7 = 49 nails

Difference = Old value - New value

Difference = 63-49 = 14

The total number of nails will decrease by 14 when Willa will use 7 nails on each side.

Keywords: multiplication, subtraction

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Nolan drew a right triangle. how many acute angles did he drew?

Answers

2 acute angles because all of the angles of the triangle must add up to 180 degrees. If you used 90 degrees already you only have 90 degrees left to make the other two angles.

The formula for the circumference of a circle is C = 2r. What is one-fourth of the circumference of a circle that measures 12 centimeters around? If necessary, use 3.14 for .

Answers

The formula of a circumference is:

C=2\pi r

r - radius

or

C=d\pi

d - diameter

We have d = 12cm. Substitute:

C=12\pi\ cm

One-fourth of the circumference:

(1)/(4)C=(1)/(4)\cdot12\pi=3\pi\ cm\approx3\cdot3.14=9.42\ cm

Answer:  9.42 cm.

HELP !!! Use the elimination method to solve the system of equations. 4x + 3y = 11
x - y = 8

Answers

Answer:

C. (5, -3)

Step-by-step explanation:

4x + 3y = 11

x - y = 8  (multiply by 3) --> 3x - 3y = 24


4x + 3y = 11

3x - 3y = 24

---------------------add

7x = 35

 x = 5


5 - y = 8

y = 5 - 8

y = -3

(5, -3)

Answer:

C. (5, -3)

Step-by-step explanation:

Rewrite the first equation.

Multiply the second equation by 3 and write it under the first equation.

4x + 3y = 11

3x - 3y = 24

Now add the equations.

7x        = 35

Divide both sides by 7.

x = 5

Substitute 5 for x in the original first equation:

4(5) + 3y = 11

20 + 3y = 11

3y = -9

y = -3

Solution: (5, -3)

in the figure p is the incenter of isosceles rst what type of triangle is rpt? Thank you in advance .

Answers

Answer:

\Delta \text{RPT is an isosceles triangle}

Step-by-step explanation:

As in the triangle RST,

RS=ST\ \ \ \Rightarrow m\angle SRT=m\angle STR

Because if in a triangle two angles equal one another, then the sides opposite the equal angles also equal one another.

Incenter is obtained by the Intersection of a triangle's three angle bisectors and it is equidistant from the three sides of the triangle.

So, RP and TP are the angle bisectors of ∠R and ∠T respectively.

\Rightarrow (m\angle SRT)/(2)=(m\angle STR)/(2)

\Rightarrow m\angle PRT=m\angle PTR

\Rightarrow PR=PT

\Rightarrow \Delta \text{RPT is an isosceles triangle}

Isosceles triangles mean that 2 sides of the triangle are congruent. Since triangle RST is isosceles and P is its incenter, that means that PT and PR must be congruent, also. PRT is an isosceles triangle.
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