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Digiron [165]
4 years ago
13

Who to solve 6n+2f=736 and 10n+2f=920 by doing elimination

Mathematics
1 answer:
Irina-Kira [14]4 years ago
4 0
<span>A) 6n+2f=736
B) 10n+2f=920
Multiply equation A) by -1
</span><span>A) -6n -2f= -736  Then add to equation B)
B) 10n+2f=920
4n = 184
n = 46
</span>
<span>B) 10*46 +2f =920
B) 460 + 2f = 920
</span><span>B) 2f = 460
B) f = 230


</span>
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Solve for b. a+3b=5c-9
notka56 [123]

Answer:

(5c-9-a)/3

Step-by-step explanation:

1. subtract a from both sides to isolate the variable and its coefficient

5c-9-a = 3b

2. divide both sides by 3 to isolate b because 3b/3 = b

(5c-9-a)/3 = b

5 0
2 years ago
SOMEONE HELP ME I GO CLASS IN 10 MINS!!
QveST [7]

Answer:

i think its mq

Step-by-step explanation:

3 0
3 years ago
The temperature falls from 0 degrees to Negative 12 and one-fourth degrees in 3 and one-half hours. Which expression finds the c
ANEK [815]

Answer:

The expression used to find the change in temperature per hour is Algebraic expression

Thus per hour; the temperature falls at the rate of - 3\dfrac{1}{2}^0

Step-by-step explanation:

A temperature falls from 0 to  - 12\dfrac{1}{4}     in     3\dfrac{1}{2} \ hours

Which expression finds the change in temperature per hour.

From the above given information;

The initial temperature is 0

The final temperature is  - 12\dfrac{1}{4}  

The change in temperature is \Delta T = T_2  -  T_1

\Delta  T = -12\dfrac{1}{4} -0

\Delta T = -12.25

Thus;

-12.25 ° = 3.5 hours

To find the change in x°   per hour; we have;

x°            = 1 hour

The expression used to find the change in temperature per hour is Algebraic expression

From above if we cross multiply ; we have;

(- 12.25° × 1 hour) = (x° × 3.5 hour)

Divide both sides by 3.5 hours; we have:

\dfrac{-12.25^0*1 }{3.5}=\dfrac{ x^0 *3.5}{3.5}

x° =  - 3.5

x° = - 3\dfrac{1}{2}

Thus per hour; the temperature falls at the rate of - 3\dfrac{1}{2}^0

8 0
3 years ago
I spent 25 Points, PLEASE HELP! In a graph, x represents the number of months since a business opened, and y represents the tota
vlada-n [284]
First find the slope.  m=(y2-y1)/(x2-x1)

m=(4225-1990)/(5-2)=745,

m is the slope, this represents the amount of money earned each month that the business operates.

so far we have:

y=745x+b, using any point we can solve for b, I'll use (2,1990)

1990=745(2)+b

1990=1490+b

500=b

b is the y-intercept which is $500, it represents the amount of moeny that the business started with.


3 0
3 years ago
Read 2 more answers
Please work out question number 12 with working and answer. I'm stuck help please.​
Marianna [84]

Answer:

£40

Step-by-step explanation:

Sum the parts of the ratio 5 + 1 = 6 parts

Divide £48 by 6 to find the value of one part of the ratio

£48 ÷ 6 = £8 ← value of 1 part of the ratio

Thus the larger part of the ratio is

5 × £8 = £40

4 0
3 years ago
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