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frosja888 [35]
3 years ago
5

A first number plus twice a second number is 4. Twice the first number plus the second totals 20. Find the numbers

Mathematics
1 answer:
pychu [463]3 years ago
4 0

Answer:

The first number is 6

The second number is -1

6+(-2)=4

6*2=12 12+(-1)=11

Step-by-step explanation:


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How many cm in 1.5 km
nignag [31]

Answer:

1.5 Kilometers and 150000 Centimeters

Step-by-step explanation:

5 × 10 -5 kilometers in 1 1 / 2 centimeters. To convert any value in centimeters to kilometers, just multiply the value in centimeters by the conversion factor 1 / 100000 . So, 1.5 centimeters times 1 / 100000 is equal to 1.5 × 10 -5 kilometers.

I hope this helps!

3 0
4 years ago
Two hikers started at the same location. One
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3 years ago
Last year, there were 234 pies baked for the bake sale. This year, there were b pies baked. Using b , write an expression for th
Lisa [10]

Answer:

234+b

Step-by-step explanation:

Last year 234 pies were baked

This year b pies were baked

total pies = last year plus this year

total pies = 234+b

The expression does not have an equals sign  so the expression is 234+b

4 0
3 years ago
A rentail truck company charges $25 per day plus $0.35 for every mile (m) driven. Which equation can be used to find the number
Sunny_sXe [5.5K]

Answer:

0.35m + 25 = 42.50

Step-by-step explanation:

If you were to rent a truck for one day you will first have to pay a $25 fee for one day. This is represented by + 25 in the equation above.

Then for every mile you go you must pay $0.35, represented as 0.35m.

<em>As an example to make it easier if you had to pay 1 dollar per mile and you went 10 miles it would cost $10. This can be proved by 1m (m being the variable for number of miles) Plug in 10 for m and you can asee 1(10)=10, because obviously 1 times 10 is 10. </em>

Same premise with $0.35

Then both of those fees added up are equal to a total of $42.50.

To prove it can find the exact number of miles that need to be driven to cost a total of $42.50 just follow steps bellow.

1. 0.35m + 25 - 25 = 42.50 - 25

Subtracting the inital fee since it is part of the total, and if you add/subtract/multiply/divide on one side you must do to the other.

2. 0.35m/0.35 = 17.50/0.35

You divide because m is being multiplied with 0.35 and to undo the multiplication you divide. Doing the same to both sides.

3. m = 50

Plug in 50 to "m" in the equation above and if both sides are equal the answer is valid.

4 0
3 years ago
Quick algebra 1 assignment for 50 points!
Nitella [24]

Step-by-step explanation:

Direct variation is essentially a linear equation, where there is a constant rate. Direct variation can be applied to many things, and we can use it to represent how much money someone has in their bank account after "x" weeks if they're depositing a constant amount of money each week.

So a practical example would be: If someone just opened a bank account and deposits $50 every week, how many weeks will it take for them to have $400 in their account.

So the slope is given in the question, it's $50, since their depositing that constant amount each week. So this gives us the equation: y=50x where x represents the amount of weeks. The y represents the amount of money they have, and since we want to find when this equals 400, we set the y=400, and then solve for x. This gives us the equation: 400=50x. Dividing both sides by 50 you get: 8=x. So it'll take 8 weeks to have $400 dollars, if you deposit 50 dollars each week.

5 0
2 years ago
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