MATHEMATICS MIDDLE SCHOOL

What is the value of the expression 5b+3c-20+3b-15c+4 when b= 2 and c= -3

Answers

Answer 1
Answer:

Answer: 36

Step-by-step explanation:

5(2)+3(-3)-20+3(2)-15(-3)+4

10-9-20+6+45+4

-19+55

36

Answer 2
Answer:

Answer:

36

Step-by-step explanation:


Related Questions

MIDDLE SCHOOL

Wilmer already has 214 cards. he needs to collect 334 cards. he plans to collect 8 cards each day. find the minimum number of days wilmer will take to reach his goal.​

Answers

The answer is 15 days.

The first step you need to take is to subtract the amount of cards he has from the amount of cards he needs. So 334 (needs) - 214(has) = 120 cards he still needs. So he is collecting 8 cards a day. In order to find out how many days it will take to collect the 120 cards, we need to divide 120 by 8. 120 divided by 8 is 15. So it will take 15 days collecting 8 cards a day in order to reach the 120 cards he still needs to collect.
MIDDLE SCHOOL

How do you solve this 2y/3-9= 2y+3

Answers

y= -5

Multiply both sides by 3

you get (2y−27=6y+9)

Subtract 2y from both sides

Simplify 6y+9−2y to 4y+9

Subtract 9 from both sides

Simplify −27−9 to −36

Divide both sides by 4

Simplify 36/4 to 9

Then switch the sides to get,

y= -9



MIDDLE SCHOOL

What is the square root of 3&4

Answers

Square root of 3 is 1.732050808 or round to 1.732 (3 decimal place) and square root of 4 is 2
MIDDLE SCHOOL

Suppose that 2 people exercising in an enclosed room are each generating about 2.400 BTUs of body heat per hour. If the room is 20 ft x 12 ft x 10 ft, how many BTUs per cubic foot do they produce in 1 hour?
A)2 BTUs/ft?
B)3 BTUs/ft?
C)4 BTUs/ft?
D)6 BTUs/ft?

Answers

Answer:

0.002  BTUs per cubic foot heat is produced per hour

Step-by-step explanation:

Given:

Number of person = 2

Amount of heat produced by one person = 2.400 BTU

Dimension of the room = 20 ft x 12 ft x 10 ft

To Find:

How many BTUs per cubic foot do they produce in 1 hour = ?

Solution:

E =

Substituting the values

E =

E =

E = 0.002  BTU per cubic feet

Answer: A)2 BTUs/ft3

Step-by-step explanation:

Got it right on USA test prep

MIDDLE SCHOOL

What is 5920 divided by 6

Answers

Answer:

Step-by-step explanation:

you can use your calculator to count it, any calculator can find the answer

MIDDLE SCHOOL

What is the answer to this Find y when x=9 if y varies directly as the square of x and y=245 when x=7

Answers

Since the variation is direct, then we have an equation of the form:
 
 From here, we must find the value of k.
 For this, we use the following data:
 y = 245 when x = 7
 Substituting values we have:
 
 Rewriting we have:
 
 Clearing k we have:
 
 
 Therefore, the equation is given by:
 
 Evaluating the equation for x = 9 we have:
 
 Answer
 The value of y when x = 9 is:
 
MIDDLE SCHOOL

What is the axis of symmetry?

f(x)=2x^{2} -2x+6[/tex]

Answers

For the expression
.. ax^2 +bx +c
The line of symmetry is
.. x = -b/(2a)
Here, that is
.. x = -(-2)/(2*2) = 1/2

The axis of symmetry is x = 1/2.
HIGH SCHOOL

I feel like I always ask for help :/ but can someone answer this please, thanks Maria wants to solve the following system using the elimination method:

4x + 9y = 59
x + y = 17

What number should the equation x + y = 17 be multiplied by to eliminate y? (4 points)


4

−4

9

−9* i think its this one

Answers

You are correct. You multiply both sides of the second equation by -9 so that the y turns into -9y. That way you add it to the +9y in the first equation to get 0y (the y terms cancel afterward). Nice work.
MIDDLE SCHOOL

4 1/3 cans of water must be added to a can of lemonade concentrate to make 64 ounces of lemonade. How many cans of water are needed to make 96 ounces of lemonade?

Answers

You need about 6.45 cans. To solve, you'd divide 4 1/4 by 8 since 8 is a factor of 64 and 96. You'd then multiply it by 12, because 8*12=96.

Answer:

6 1 /2  cans of water.

Step-by-step explanation:

To make  

64

ounces of lemonade, we need  

4

1

3

=

4

×

3

+

1

3

=

13

3

cans of water.

Hence for  

1

ounce of lemonade we will need  

13

3

×

1

64

cans of water, and

for  

96

ounce of lemonade we will need

13

3

×

1

64

×

96

cans of water, i.e. (dividing by  

32

13

3

×

1

2

64

×

3

96

1

or

13

3

×

1

2

×

3

1

=

13

2

=

6

1

2

cans of water.

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