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Lemur [1.5K]
3 years ago
11

Plz help if u can 20 pt please just don't take the points..

Mathematics
1 answer:
sergey [27]3 years ago
5 0

Answer:

b. 28x + 8y +2

Step-by-step explanation:

you need to distribute the -2 to all the numbers inside parentheses and then combine like terms.

-2*3x= -6x

-2*12y= -24y

-2*-5= 10 (remember neg times neg = pos)

-2*17= 34x

-2*-16y=32y

-2*4= -8

Now combine like terms

34x-6x= 28x

32y-24y=8y

10-8=2

Write the expression:  28x + 8y +2

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What is the solution to the system of linear equations below?<br> - 2x + 5y<br> 30
avanturin [10]
Answer: Infinite solutions

Step 1: Turn this into y=Mx+b form

The current equation is—

-2x+5y=30

Since we want to get y alone on the left side, let’s add 2x on both sides

-2x+5y=30
+2x +2x
____________
5y=2x+30

Step 2: Again, trying to get y alone, we need to divide 5 on both sides

5y=2x+30
/5 /5 /5
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y=2/5x+6

Step 3: Now that we know how to find y, substitute that in where y is in the equation

-2x + 5(2/5x+6) = 30
-2x + 2x + 30 = 30
30=30

Seeing that you cannot get a specific answer for y when solving, there is an infinite number of solutions


Hope this is right and it helps comment below for more questions :)
5 0
3 years ago
Find the simple interest earned to the nearest cent for each principal, interest rate, and time.
Y_Kistochka [10]

Answer:

Interest earned at 3.9 percent rate is $31.2

Interest earned at 2 percent rate is $5.8

Step-by-step explanation:

A = P(1 + rt)

Where 'A' is the amount, 'r' is the rate and 't' is the time in years

When;

P = $1200

r = 3.9%

t = \frac{8}{12} years

Then,

A = $1200(1 + 0.039(\frac{8}{12}))

A = $1200 + $31.2 = $1231.2

Interest = Amount - Principal

Interest earned at 3.9 percent rate is $1231.2 - $1200 = $31.2

When;

P = $580

r = 2%

t = \frac{6}{12} years

Then,

A = $580(1 + 0.02(\frac{6}{12}))

A = $580 + $5.8 = $585.8

Interest earned = Amount - Principal

Interest earned at 2 percent rate = $585.8 - $580 = $5.8

4 0
3 years ago
A trucker drove 300 miles in 5 hours, took a rest for an hour, then drove another 400 miles is 6.6 hours. What is the truckers a
Vaselesa [24]

Answer:

25x = - 1820

x = -72.8

The truck drove 72.8 miles at 45mph and 100-72.8 = 27.2 miles at 20mph

Step-by-step explanation:

4 0
3 years ago
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12345 [234]
Some sums on a die take up the majority. for example, 1 cant get any bc there is no sum to get 1 on a die
3 0
2 years ago
7 - 5x + 2 ( x - 5 ) =
sineoko [7]

Answer:

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3 0
3 years ago
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