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FromTheMoon [43]
3 years ago
15

PLS HELP Use elimination to solve each system of equations. 6x + 5y = 4 6x - 7y = -20

Mathematics
1 answer:
tatyana61 [14]3 years ago
5 0

Answer:   Point Form:

                        ( − 1 ,2 )

Equation Form:

x = − 1 , y = 2

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Ratio And Proportion
Allushta [10]

Answer:

11200 for 7 engines for a total of 80 hours

Step-by-step explanation:

You have 8 engines burning 12000 .for 10 hours.

Divide 10 hours into 12000=1200 PER hour.

1200 ÷8 engines = 140 per hour per engine.

140 × # of hours (12)=1680 for 12 hours per engine.

# of engines × 1680 for 12 hour/per engine

5×1680 = 8400 of fuel for 12 hours/5 engine

Then you have 2 that runs 10 hours

2 × 140 per hour per engine =280 × 10 =2800 for 2 engines for 10 hours

8400. + 2800= 11200 of fuel for 6 engines

4 0
3 years ago
Translate the following phrase to a mathematical expression: a number times fifteen.
crimeas [40]

Answer:

it could either be n15

15n

because a number multiplied by 5 is

n15

but in mathematics a number comes before a letter when writing a mathematical expression

8 0
3 years ago
Read 2 more answers
What is the coefficient in the expression 5 + 9y?
LenKa [72]

Answer:

yesyes

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
770 is 70% of what number?
Andreyy89

Answer:If you are using a calculator, simply enter 770×100÷70, which will give you the answer.

Step-by-step explanation:

3 0
3 years ago
Is the set of numbers one 1,5,25 and 125 a geometric sequence
Strike441 [17]
Short answer: Yes.
Each member of the sequence is multiplied by 5 to get to the next member of the sequence.

Find the general equation.
tn = a*5^(n - 1)

Example
t4 = 1*5^(4 - 1)
t4 = 1*5^3
t4 = 125 just as the sequence shows.

t5 = 1^5^4
t5 = 625     Any member of the sequence can be found this way.
6 0
3 years ago
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