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3 years ago

Simplify the following expression: (2a - 3) + (-a + 5) PLEASE HELP ME

Mathematics

2 answers:

Feliz [49]3 years ago

8 0

Answer:

(a+2)

Soo you could solve by removing the parenthesis, then combining all like terms. Then subtract.

lubasha [3.4K]3 years ago

5 0

Your answer would be 1a+2
Or a+2

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Round 487.010 to the nearest whole number. Enter your answer in the space<br> provided

saw5 [17]

Answer:

487

Step-by-step explanation:

The answer is 487 because you must look one place to the right of the whole number for the rounding digit on the right side of the decimal point which is 0. Then you round down since the digit is not greater than 5.

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3 years ago

Which answer best describes (n k)

trasher [3.6K]

The answer is A

Have to add characters to get to 20

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3 years ago

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An Italian restaurant made 6 breadsticks for a table of four people. How many breadsticks will they need to make if they are exp

inessss [21]

Answer:

i think that is 147

Step-by-step explanation:

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3 years ago

Solve for x use the completing the square method x^2+6x=5

Mrac [35]

Answer:

$x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}$

Step-by-step explanation:

$x^{2}$ +6x-5=0

we divide the coefficient of the X by half :

in this case: 6/2 = 3 , then we do the following

The result obtained is raised to square power: 3^2=9

we sum and subtract by 9 to maintain the balance of the equation:

$x^{2}$ +6x+9-9-5=0

we have:

$(x+3)^{2}$ -9-5=0

$(x+3)^{2}$ = 14

lets apply square root on both sides of the equation:

$\sqrt{(x+3)^{2}}=\sqrt{14}$

we know:

$\sqrt{a^{2}} = abs(a)$

so we have:

abs(x+3)= $\sqrt{14}$

from where two solutions are obtained

$x_{1} + 3 =\sqrt{14} \\\\x_{2} + 3 =-\sqrt{14}$

finally we have:

$x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}$

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3 years ago

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Bumek [7]

Answer:

176/231

Step-by-step explanation:

88 blue marbles, 55 green marbles, and 88 red marbles =231 marbles

P (blue or red marble) = number of red or blue/ total

= 88+88 / 231

=176/231

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3 years ago