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2 years ago

Which choice is the most efficient first step to solve this set of equations?

Mathematics

2 answers:

Nastasia [14]2 years ago

8 0

Answer:

x + 2x = 30 is the correct answer.

harina [27]2 years ago

3 0

2x + x + y = y + 30 I think.

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Dan and Dave can work together to paint a house in 4 days. Dan works twice as fast as Dave. How long would it take each of them

SSSSS [86.1K]

Answer:

Dan=6 days Dave=12 days

Step-by-step explanation:

1/2x + 1/x = 1/4

multiply each by 8x bc 4 * 2x = 8x

4 + 8 = 2x

12 = 2x

6 = x

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2 years ago

Six divided by the difference of a number and 1, minus 5 divided by a number plus 1, equals 5 times the reciprocal of the diff

AleksandrR [38]

I am not very good you should probably ask someone else sorry

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3 years ago

Sandy multiplies 2*5*7*2*5*7*2*5 and writes the product as a counting number.What is the sum of the digits of this counting numb

DiKsa [7]

Answer:

The sum of the digit of the product is 13

Step-by-step explanation:

Given

$2*5*7*2*5*7*2*5$

Solving (a): The product

$Product=2*5*7*2*5*7*2*5$

$Product=49000$

Solving (b): The sum of the digits

$Sum = 4 + 9 +0 +0+0$

$Sum = 13$

6 0

2 years ago

My sister went QUaCk and my heart QuaKeD

labwork [276]

Answer:

That's nice

But it should've YEETED

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The solution to -3(2 - 5x) = 3x + 12 is<br> 1. -2.25<br> 2. -1.625<br> 3. 1.5<br> 4. 3

Nonamiya [84]

Answer:

1.5

Step-by-step explanation:

i am not certain but this is how I got it

First distribute which gives you the -3 with 2 I switched them around so I did -3(-5x+2) and you will get 15x-6

Then the opposite of subtraction is addition so you add 6 to both sides so you add six to 12 and to 6 leaving you with 15x=3x+18 you then will subtract 3x from 15x and 3 leaving you with 12x=18 the divide the numbers

After you divide you get 3/2 then put it has a decimal and you get 1.5

3 0

3 years ago