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Feliz [49]
3 years ago
15

Please help me!! what were the errors​

Mathematics
1 answer:
spayn [35]3 years ago
4 0

Answer:

see explanation

Step-by-step explanation:

Given

23x + xy - y + 3y + 5 - 20x + 6xy ← collect like terms

= (23x - 20x) + (xy + 6xy) + (- y + 3y) + 5

= 3x + 7xy + 2y + 5

He combined the coefficients of the x- term incorrectly

He combined the coefficients of the y- term incorrectly

He missed out the constant term ( + 5)

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You are a plumber, and you are repairing a toilet leak. The job should take 0.9 hours. About how many minutes will it
monitta

Answer:

54

Step-by-step explanation:

multiply 60 by 0.9 and you get 54..?

6 0
3 years ago
Read 2 more answers
Manuel bought 2kg of jelly beans and 2kg of gummy worms for a total of $26. Danny bought 2kg of jelly beans and 3kg of gummy wor
charle [14.2K]

Answer:

Jelly beans: $6 for 1 kg

Gummy worms: $7 for 1 kg

Step-by-step explanation:

In this question, we need to find the cost of 1kg of jelly beans and gummy worms.

To do this, make equations for both scenarios and solve:

2j + 2g = 26

2j + 3g = 33

Turn the bottom equation negative, as we will first solve for gummy worms (g).

2j + 2g = 26

-2j - 3g = -33

Solve:

-g = -7

Divide both sides by -1.

g = 7

We now know that gummy worms cost $7 for 1 kg

To solve for jellybeans (j), plug in 7 to g in one of the equations and solve:

2j + 2(7) = 26

2j + 14 = 26

Subtract 14 from both sides.

2j = 12

Divide both sides by 2.

j = 6

Jellybeans cost $6 for 1 kg.

Check answer by plugging in values to one of the equations:

2(6) + 2(7) = 26

12 + 14 = 26

26 = 26

3 0
3 years ago
F(x) = 4/x-9<br> g(x)=4/x + 9<br> find f(g(x))
Alenkinab [10]
Hello,

f(x)= \dfrac{4}{x-9} \\&#10;&#10;g(x)= \dfrac{4}{x+9} \\&#10;&#10;f(g(x))=f( \dfrac{4}{x+9} )\\&#10;&#10;= \dfrac{4}{ \dfrac{4}{x+9}-9} \\&#10;&#10;= \dfrac{4(x+9)}{4-9x-81} \\&#10;&#10;=- \dfrac{4x+36}{77x+9x} &#10;&#10;&#10;
6 0
3 years ago
F(x) = x/4 - 3
Ilya [14]
First plug in the equations, then simplify/cancel out terms until you get the answer

4 0
2 years ago
-73 greater than or equal to 15 + 11x
Alecsey [184]
-73 ≥ 15 + 11x 
so the first thing you should do is to add -15 on both sides of the equation so you will have:
-73 -15 ≥ 11x 
- 88 ≥ 11x 
so the answer is:
-88/11 ≥ x or -8 ≥ x :)))
i hope this is helpful
have a nice day 
5 0
3 years ago
Read 2 more answers
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