I need the answers for these please

Answers

Answer 1

Answer: 11.p=-8, 17-8=9
12.y=11, 3*11=33+16=46
13.t=4, 4*4=16-14=2
14.x=9, -9x 9*8=82-9=72-9=62
15.z=4, 12*4=48-18=30
16.g=0, 4*0=0, 7+0=7
17.x=4, 9*4=36-24=-3
18.q=3, 18*3=48+2=50
19.c=2, 3*2=6-4.5=4.1
20.y=4, 9+4=13+4.8=17.4

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The sum of two numbers is 100 and their difference is -20. What are the two numbers?
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Determine the mechanical energy of this object: a 1-kg pendulum has a speed of 2 m/s at a height of 1 meter.

Answers

I am going to help you using physics......

Mechanical Energy = Potential Energy + Kinetic energy (or vice versa)

ME = PE + KE

PE = mgh ( m= mass; g = gravity constant which is 9.81; h = height)
= (1kg)(9.81)(1m)
PE = 9.81

KE = 1/2mv^2 (m = mass)(v = velocity)
= 1/2(1 kg)(2 m/s^2)
= (1/2)(4)
KE = 2

ME = KE + PE
ME = 9.81 + 2
ME = 11.81

hope this helps :)

Answer:11.8j

Step-by-step explanation:

Brittany wants to make cookies for the whole fourth grade.One batch of dough makes 2 dozen cookies.There are 68 fourth graders at her school.Is it reasonable to say that Brittany will need more than two batches of dough?

Answers

Yea because 12+12 is only 24 so she will need a lot more. Cookie dough

Which question is a statistical question?O
How many students are there in my class?
O
How long is recess for all the students in my class?
O
How many times was I absent from school last year?
O
How long does it take the students in my class to travel to school?

Answers

Answer:

How long does it take the students in my class to travel to school?

Step-by-step explanation:

A statistical question is one that can be answered by collecting data and where there will be variability in that data.

What is equivalent to 1/3a.2/7, 3/8, 4/5
b. 2/6, 3/9, 4/12
c.5/8, 3/4, 4/6
d. 3/5, 4/6, 2/8

Answers

what you would do is simplify everything so in b. 2/6 would simplify into 1/3 as well as 3/9 and 4/12 would also simplify into 1/3. in group c. you would only have to simplify 4/6 into 2/3 and group d. 2/8 would be 1/4. now I'm assuming that all the numbers in the group would have to simplify to 1/3 in order to be correct so group b. would be the right answer

Write a expression that is equivalent to 7/10

Answers

An expression that is equivalent to 7/10 is .70, 70/10. Those are just a few examples. There are many more! I hope this helped.

8×-3×=10
Show your work

Answers

x = 2

First, combine like values. 8x - 3x = 5x

Now, you are left with 5x = 10

Next, divide both sides of the equation by 5.

5x / 5 = 10 / 5

x = 2

There’s the answer!

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Whats the estimate to 308.3÷15

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