Choose the best estimate of the sum or diffrence.

Mathematics

1 answer:

Elza [17]2 years ago

7 0

A. 5 because if your subtracting your answer isn’t going to get any bigger than the origina

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Help me out with number 8!!! I’m confused and I need this by tomorrow HELP PLEASE

ivann1987 [24]

We can use elimination for these set of systems.
First, we need to set up our variables.
Belts=b
Hats=h
Now, the situation is 6 belts and 8 hats for $140. The situation after is 9 belts and 6 hats for $132.
Let’s set up our system of equations.
6b+8h=140
9b+6h=132
We need to eliminate a variable. Since b has coefficients of 6 and 9, we can easily eliminate b by multiplying the top equation by 3 and the bottom by -2.
18b+24h=420
-18b-12h=-264
Now let’s add.
12h=156
Let’s divide to get h by itself.
156/12=13=h
So a hat costs $13. We need to put in 13 for one of the equations so we can find the cost of a belt.
9b+6(13)=132
9b+78=132
We need b by itself.
9b=54
54/9=6
Belts are $6
We can also use the first equation to check our answers.
6(6)+8(13)
36+104
140.
So, the price of a belt is $6 while the price of a hat is $13.

3 0

2 years ago

Find two numbers a and b whose sum a+b is −1, and whose difference a−b is 1.

fiasKO [112]

The a is 1 and the b is 0

3 0

2 years ago

State the type of angles and solve for the given variable.

Evgen [1.6K]

Step-by-step explanation:

the given pair is Alternate Exterior Angle

so their values are equal so,