Algebra Expressions Easy

식을 간단히 하시오: 3x + 2x - 5

• 5x - 5

• 8x - 5

• 6x - 5

• 5x + 5

Answer explanation

To simplify the expression 3x + 2x - 5, combine like terms to get 5x - 5. Therefore, the correct choice is 5x - 5.

x = 4 일 때, 다음 식을 평가하시오: 2x + 7

• 15

• 9

• 20

• 11

Answer explanation

Substitute x=4 into the expression 2x + 7 to get 2(4) + 7 = 8 + 7 = 15. Therefore, the correct answer is 15.

유사 항목을 결합하시오: 4y + 2y - 3y

• 5y

• 6y

• 2y

• 3y

Answer explanation

To combine like terms, add the coefficients of y. 4y + 2y - 3y = 3y, so the correct answer is 3y.

분배 법칙을 적용하시오: 2(3x - 5)

• 3x - 5

• 6x + 10

• 6x - 5

• 6x - 10

Answer explanation

To apply the distributive property, multiply 2 by each term inside the parentheses: 2(3x) - 2(5) = 6x - 10. Therefore, the correct choice is 6x - 10.

다음 단어 문제에 대한 대수식을 작성하십시오: John이 x개의 사과를 가지고 있고 5개를 더 산다면, 지금 몇 개의 사과를 가지고 있습니까?

• x * 5

• x + 5

• 5x

• x - 5

Answer explanation

The correct choice is x + 5 because John starts with x apples and buys 5 more, resulting in x + 5 total apples.

x에 대해 풀어보세요: 2x + 8 = 16

• x = 10

• x = 6

• x = 4

• x = 2

Answer explanation

To solve for x, subtract 8 from both sides: 2x = 8. Then divide by 2 to get x = 4. Therefore, x = 4 is the correct answer.

분수를 간단히 하시오: 3/4 + 1/2

• 2 1/4

• 1 3/4

• 1 1/2

• 1 1/4

Answer explanation

To simplify the fraction, find a common denominator which is 4. Then, add the numerators: 3/4 + 2/4 = 5/4 = 1 1/4. Therefore, the correct answer is 1 1/4.

소수 0.75를 분수로 변환하시오

• 4/5

• 1/2

• 2/3

• 3/4

Answer explanation

To convert 0.75 to a fraction, we can write it as 75/100 and simplify by dividing both the numerator and denominator by 25 to get 3/4, which is the correct choice.

x = 3일 때, 다음 식을 평가하시오: 4x - 5

• 10

• 7

• 8

• 12

Answer explanation

Substitute x=3 into the expression 4x-5 to get 4(3)-5=12-5=7. Therefore, the correct answer is 7.

유사 항목을 결합하시오: 7a + 3a - 2a

• 4a

• 10a

• 8a

• 5a

Answer explanation

Combining like terms 7a + 3a - 2a simplifies to 8a, as 7a + 3a = 10a and then subtracting 2a gives 8a.