MATHEMATICS MIDDLE SCHOOL

Charlie runs at a speed of 3 yards per second. About how many miles per hour does Charlie run?

Answers

Answer 1
Answer: Times 3 by 3,600 and you find out that he runs 10,800 yards per an hour. Now there are 1,760 yards in a mile so if you divide 10,800/1,760 and get 6.14 
So charlie runs 6.14 MPH

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1. Solve x2 + 8x - 6 = 0 using the Quadratic Formula.
A man bought a TV for £300. He had to pay a deposit of 15%. How much did he pay?

A car salesperson earns 5.8% commission on every car sold. How much commission will the salesperson earn on the sale of a $28,400 car? Remember this is a money answer so 2 decimal places.

Answers

Answer:

$1647.20

Step-by-step explanation:

28400x 5.8% which equals .058 in decimal form which gives you $1647.20

The anwser is $1647.20

3. Matt bought 12 packages of hot dogs and hamburgers for a barbecue. Let x represent the number of packages of hot dogs, which cost $2.75 each. Let y represent the number of packages of hamburgers, which cost $3.20 each. Matt spent a total of $35.25. Write and solve a system of equations that can be used to represent the amount of hot dogs and hamburger packages Matt bought. Are there any constraints on your variables? Is the solution viable or non-viable?

Answers

Answer:

Matt bought 7 packages of hot dogs and 5 packages of hamburger.

Step-by-step explanation:

We are given the following in the question

Let x represent the number of packages of hot dogs.

Cost of one packet of hot dog = $2.75

Let y represent the number of packages of hamburgers

Cost of one packet of hamburgers = $3.20

Then, we can write the following equations:

x + y = 12\n2.75x + 3.2y = 35.25

Solving the two equations,

2.75x + 2.75y = 33\n2.75x + 3.2y = 35.25\n\Rightarrow 0.45y = 2.25\ny = 5\nx = 7

Thus, Matt bought 7 packages of hot dogs and 5 packages of hamburger.

The solution is viable.

Constraints to the system of equation:

x,y \geq 0 \nx + y = 12\n2.75x + 3.2y = 35.25

9*-0^2 is blank times as much as 3*10-^2

Answers

Explanation:

As I understand the question you have the following expressions given in scientific notation:

Expression A:

9*10^2

Expression B:

3*10^(-2)

So we need to compare both expression in order to know how much times is expression A bigger than B. So:

(9* 10^2)/(3* 10^(-2))=(9)/(3)*10^(2-(-2))=3* 10^4=30,000 \n \n \n *(a^n)/(b^m)=a^(n-m)

In conclusion 9*10^2 is 30,000 times as much as 3*10^(-2)

I need help on this problem please and thank you

Answers

I think it's -17 and 13 because that's both times the x-intercept is zero. I hope this helps. ;-)

Annaka used partial quotients to divide 145 by 5. What can be a partial quotient?

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In partial-quotients division, it takes several steps to find the quotient. At each step, you find a partial answer (called a partial quotient); then you find the product of the partial quotient and divisor and subtract it from the dividend. Finally, you add all the partial quotients to find the final quotient.

See the attached figure.

So, the answer is ⇒ 29

Simplify The following equations(This is algebra, so PLEASE, only answer if you KNOW FOR SURE, thank you)

3a+7b+2c-a-4b

-8a-b-(-6c)-2a-b-5c

b-4c+3a-c-9b-4a

Answers

mostly collect like terms
use associative property which is
(a+b)+c=a+(b+c)
also -a+b-c=(-a)+(b)+(-c) so you can move them around
and remember that:
you just use a general rule
x+x=2x
x^2+x^2=2x^2
3xy4xy=7xy
3x+4x^2=3x+4x^2
youcan only add like terms( like terms are terms that are same name like xor y are differnt, and like terms have same power exg x^2 and x^3 andx^1/2 and such

I will oly put the naswers because I don't have much time

first one: 2a+3b+2c

second one: remember that -(-6c)=+6c so the answer is c-10a-2b

third one: -a-8b-5c
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