Answer:
Step-by-step explanation:
Total amount of money that Marina saved from her babysitting job is $80.
She wants to buy some shirts and pants that are on sale at her favourite store for $17 each. To determine how many items of clothing that she can buy, we would divide the total amount that she saved by the cost of each clothing. It becomes
80/17 = 4.7.
Since the number of clothing must be whole number, the number of clothing that she can buy would be 4
Answer:
could be not safe pls put image
Step-by-step explanation:
The elimination method works by adding the two equations and eliminating one variable. Then you solve an equation in one variable. Finally, you use substitution or elimination again to find the other variable. Sometimes, by simply adding the equations, a variable is not eliminated. Then you need to multiply one or both equations by a factor to get a variable to be eliminated.
A)
2x - 4y = 8
x + 3y = -11
Adding the equations does not eliminate x or y.
Notice that in the first equation, every coefficient is even. We can divide both sides of the first equation by 2. Then the first term would be x. Instead, let's divide both sides of the first equation by -2. Then the x's will be eliminated.
-x + 2y = -4 <-- The first equation divided by -2
x + 3y = -11 <-- The original second equation. Now we add the equations.
----------------
5y = -15
y = -3
Now that we know y = -3, we substitute it into the first original equation and solve for x.
2x - 4y = 8
2x - 4(-3) = 8
2x + 12 = 8
2x = -4
x = -2
Answer: x = -2; y = -3
B)
We see that the x's will be eliminated by addition. Just add the equations.
-3x + 7y = 9
3x - 7y = 1
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0 + 0 = 10
0 = 10 <---- this is a false statement, so this system of equations has no solution.
Considering the sum of the internal angles of a triangle, the measures are given as follows:
<h3>What is the sum of the internal angles of a triangle?</h3>
The sum of the internal angles of a triangle is of 180º.
In general terms, the sum of the internal angles of a polygon of n sides is given by:
S = (n - 2) x 180º.
For a triangle, n = 3, hence S = 180º.
For this problem, the three internal angles of the triangle are given as follows:
7x - 4, 4x, 73.
Hence we can solve for x applying the sum as follows:
7x - 4 + 4x + 73 = 180
11x = 111.
x = 10.09.
Hence:
A = 4x = 4 x 10.09 = 40.36º.
B = 7 x 10.09 - 4 = 66.64º.
More can be learned about the sum of the internal angles of a triangle at brainly.com/question/25215131
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Um maybe add some answers choices or a picture next time pls !!
