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3 years ago

25-5+5+10-6+18-9+35-47+27+10-36

Mathematics

2 answers:

ivanzaharov [21]3 years ago

6 0

Answer:

Step-by-step explanati

Alex Ar [27]3 years ago

3 0

Answer:

Step-by-step explanation:

The answer is 17 because 25- 10 (5+5) equals 15, +10 equals 25, -6 equals 19, +18 equals 37, -9 equals 28, +35 equals 63, -47 equals 16, +27 equals 43, +10 equals 53, -36 equals 17!

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A carpenter purchased 70 ft of redwood and 80 ft of pine for a total cost of $351. A second purchase, at the same prices, includ

elena55 [62]

Hey there!!

Let us take the cost of 1 feet redwood as ' x '

Let us take the cost of 1 feet pine as ' y '

For the first scenario :

70 ft red wood and 80 ft pine

1 feet redwood - $x

70 feet redwood - $70x

1 feet pine - $y

80 feet pine - $80y

Total = $351

70x + 80y = 351 --------------------------------- ( 1 )

Second scenario :

1 feet redwood - $x

100 feet redwood - $100x

1 feet pine - $y

60 feet pine - $60y

total - $420

100x + 60y = 420 ----------------------- ( 2 )

Now let us get both the equations together :

70x + 80y = 351 ------------- ( 1 )

100x + 60y = 420 ------------- ( 2 )

Now let us multiply the the 1st equation with 3 and the 2nd equation with 4

3 ( 70x + 80y ) = 3 ( 351 )

4 ( 100x + 60y ) = 4 ( 420 )

............................

210x + 240y = 1053

400x + 240y = 1680

...........................

Now let us subtract the first equation from the second ...

400x + 240y = 1680

- ( 210x + 240y ) = - ( 1053 )

......................

190x = 627

dividing by 160 on both sides

x = 627 / 190

x = 3.3

The cost for 1 feet or per foot for the redwood is $3.3

Now substitute the value of x in any given given equation and find out y

I will substitute in the 1st equation

70x + 80y = 351

70 ( 3.3 ) + 80y = 351

231 + 80y = 351

Subtracting by 231 on both sides

80y = 351 - 231

80y = 120

dividing by 80 on both sides

y = 120 / 80

y = 1.5

The cost for 1 feet or per foot for the pine = $1.5

The answers - $3.3 ( redwood ) ; $1.5 ( pine )

Hope my answer helps!

4 0

3 years ago

Which of these values could be the slope of the line? Select TWO options

mylen [45]

Answer:

7/4 and 3

Step-by-step explanation:

It's a positive slope (sloping up and to the right).

If its sloping from quadrant 3 to 1, it's positive

5 0

3 years ago

Marsha pays $25 each month for a car wash membership. Which of the following represents the total amount subtracted from her acc

Kipish [7]

The correct amount taken from the account for car wash membership fee is shown below:

−4|25| = −$100

What is the amount subtracted from the account on the account balance?

The amount subtracted has a negative impact on the account balance because it reduces the account balance as it is an expense or debit transaction unlike a credit that increases the balance

$25 is spent every month, which means -$25 taken from the account every month

total amount deducted for 4 months=4*-$25

total amount deducted for 4 months=-$100

The correct option which indicates -$100 is −4|25| = −$100

Find out more membership subscription fee on:brainly.com/question/28372534

#SPJ1

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2 years ago

Dominick weighs 30 pounds more than his sister. Together they weigh 330 pounds. How much does Dominick weigh?

german

Domik weights 30 pounds more than his sister

Together they weigh 330 pounds

Let "x" represent the weight of Dominik's sister, then his weight can be expressed as "x+30"

And their total weight can be calculated as:

$x+(x+30)=330$

From this expression you can calculate the value of x:

$\begin{gathered} 2x+30=330 \\ 2x+30-30=330-30 \\ 2x=300 \\ \frac{2x}{2}=\frac{300}{2} \\ x=150 \end{gathered}$

x=150 pounds

x+30=150+30=180 pounds

Dominik weights 180pounds and his sister 150 pounds

8 0

2 years ago

Read 2 more answers

Johnny paid $42 for 12 cartons of orange juice. What is the unit rate, in dollars per carton, of orange juice that Johnny paid?

Assoli18 [71]

First, you do

42 divided by 12

42/12

That will equal = 3.5

So the correct answer is the first one

$3.50 per carton

3 0

3 years ago

25-5+5+10-6+18-9+35-47+27+10-36​

25-5+5+10-6+18-9+35-47+27+10-36