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3 years ago

Evaluate the expression when a=4 and x=-3. -2a +x

Mathematics

2 answers:

Serga [27]3 years ago

5 0

Answer:11

Step-by-step explanation:

Step 1: you need to multiply-2x4 and you would get 8

Step2: you add 3 and you get 11

vekshin13 years ago

4 0

Answer:

-11

Step-by-step explanation:

-2a + x

Plug in the numbers for the variables

-2(4) + -3

Multiply( when a negative an a positive are multiplied, it is always a negative)

-8 + -3

Add

-11

Hope this helps :)

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Kayla won 37 super bouncy balls

Mariana [72]

Answer:

15 friends

Step-by-step explanation:

37 - 7=30 so then you divide 30 by 2 which equals 15 so there is your answer.

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3 years ago

The partial pressure of carbon dioxide in a mixture is 0.31 atm.

juin [17]

Answer:

$P_{Co2}= X_{Co2} P_{tot}$

Where $P_{tot}$ represent the total pressure and $X_{Co2}$ the fraction of carbon dioxide is 0.46 and we can find the total pressure with this formula:

$P_{tot}= \frac{P_{Co2}}{X_{Co2}}$

And replacing we got:

$P_{tot}= \frac{0.31 atm}{0.46}= 0.674 atm$

Step-by-step explanation:

For this case the partial presure of carbon dioxide is given by:

$P_{Co2}= X_{Co2} P_{tot}$

Where $P_{tot}$ represent the total pressure and $x_{Co2}$ the fraction of carbon dioxide is 0.46 and we can find the total pressure with this formula:

$P_{tot}= \frac{P_{Co2}}{X_{Co2}}$

And replacing we got:

$P_{tot}= \frac{0.31 atm}{0.46}= 0.674 atm$

4 0

3 years ago

five times the difference of a number and 3 is the same as 3 increased by 5 times the number plus three times the number. find t

jekas [21]

Step-by-step explanation:

5(x - 3) = 3 + 5x + 3x

5x - 15 = 3 + 8x

5x - 8x = 3 + 15

-3x = 18

x = 18/-3

x = -6

6 0

3 years ago

Which numbers are a distance of 3 units from 12 on a number line?

vodomira [7]

Answer:

9 and 15

Step-by-step explanation:

9 10 11 12 13 14 15

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3 years ago

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Greeley [361]

The first graph shows that equation.

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4 years ago