Question
12 1/4- 4 1/8
When you add or subtract fractions, you have to have the same denominator. In this problem you have to change 1/4 to 2/8. Then subtract the fraction and then subtract the whole number. Please post your answer and we'll be glad to check it.
When you add or subtract fractions, you have to have the same denominator. In this problem you have to change 1/4 to 2/8. Then subtract the fraction and then subtract the whole number. Please post your answer and we'll be glad to check it.
Answers
7 1/3
3 5/6
How many more hours does april need to drive
3 5/6
How many more hours does april need to drive
Add or subtract.
(m2 – m – 4) + (m – 5)
A. m2 – 2m + 9
B. m2 + 2m – 9
C. m2 – 2m – 9
D. m2 – 9
(m2 – m – 4) + (m – 5)
A. m2 – 2m + 9
B. m2 + 2m – 9
C. m2 – 2m – 9
D. m2 – 9
m2 - 2m - 9
Add or subtract(5x2 + x – 3) – (–2x3 + 4)
A. –2x3 + 5x2 + x – 7
B. –2x3 + 5x2 + x + 1
C. 2x3 + 5x2 + x – 7
D. 2x3 + 5x2 + x + 1
A. –2x3 + 5x2 + x – 7
B. –2x3 + 5x2 + x + 1
C. 2x3 + 5x2 + x – 7
D. 2x3 + 5x2 + x + 1
B. -2x^3 + 5x^2 + x + 1
Suppose you earned 7t – 1 dollars on Monday and 8t + 5 dollars on Tuesday. What were your total earnings? Simplify your answer.
A. –t + 4 dollars
B. –t – 6 dollars
C. 15t – 6 dollars
D. 15t + 4 dollars
A. –t + 4 dollars
B. –t – 6 dollars
C. 15t – 6 dollars
D. 15t + 4 dollars
D. 15t + 4 dollars
f 7 ∙ f 1
A. f 8
B. f 7
C. (2f)8
D. (2f)7
A. f 8
B. f 7
C. (2f)8
D. (2f)7
B. f 7
The multiplication of variables with the same base (here, f) with different exponents will result in adding the exponents.
f7 * f1 = f(7+1) = f8
The multiplication of variables with the same base (here, f) with different exponents will result in adding the exponents.
f7 * f1 = f(7+1) = f8
Start Fraction 144 superscript 14 baseline over 144 squared End Fraction
A. 14416
B. 14412
C. 14428
D. 144 superscript fourteen-halves baseline
A. 14416
B. 14412
C. 14428
D. 144 superscript fourteen-halves baseline
D. 144 superscript fourteen-halves baseline
When you divide two powers with the same base, you subtract the exponents.
144^14 / 144^2 = 144^(14-2) = 144^12
The answer is 144 superscript twelve.
When you divide two powers with the same base, you subtract the exponents.
144^14 / 144^2 = 144^(14-2) = 144^12
The answer is 144 superscript twelve.
Start Fraction x superscript 13 baseline over x squared End Fraction
A. x superscript thirteen-halves baseline
B. x15
C. x11
D. x26
C. x^11
When you divide two powers with the same base, you subtract the exponents.
x^13 / x^2 = x^(13-2) = x^11
The answer is x^11.
When you divide two powers with the same base, you subtract the exponents.
x^13 / x^2 = x^(13-2) = x^11
The answer is x^11.
Question 10 of 23
Start Fraction x superscript 13 baseline over x squared End Fraction
A. x superscript thirteen-halves baseline
B. x15
C. x11
D. x26
Start Fraction x superscript 13 baseline over x squared End Fraction
A. x superscript thirteen-halves baseline
B. x15
C. x11
D. x26
C. x^11
When you divide two powers with the same base, you subtract the exponents.
x^13 / x^2 = x^(13-2) = x^11
The answer is x^11.
When you divide two powers with the same base, you subtract the exponents.
x^13 / x^2 = x^(13-2) = x^11
The answer is x^11.
Which of the following expressions is true?
A. 43 • 44 = 412
B. 52 • 53 > 55
C. 32 • 35 < 38
D. 52 • 54 = 58
A. 43 • 44 = 412
B. 52 • 53 > 55
C. 32 • 35 < 38
D. 52 • 54 = 58
C. 32 • 35 < 38
32 * 35 = 1120
38 > 1120
Therefore, 32 • 35 < 38 is true.
32 * 35 = 1120
38 > 1120
Therefore, 32 • 35 < 38 is true.
Which of the following expressions is true?
A. 24 • 24 > 27
B. 32 • 36 = 37
C. 43 • 45 < 48
D. 52 • 53 = 56
A. 24 • 24 > 27
B. 32 • 36 = 37
C. 43 • 45 < 48
D. 52 • 53 = 56
A. 24 • 24 > 27
24 * 24 = 576
27 < 576
Therefore, 24 • 24 > 27 is true.
24 * 24 = 576
27 < 576
Therefore, 24 • 24 > 27 is true.
Write the value of the expression.
Start Fraction 4 superscript 5 baseline over 4 superscript 5 baseline End Fraction
A. 1
B. 4
C. 5
D. 0
Start Fraction 4 superscript 5 baseline over 4 superscript 5 baseline End Fraction
A. 1
B. 4
C. 5
D. 0
A. 1
When you have the same base number in the numerator and denominator of a fraction, the value of that fraction is 1.
4^5 / 4^5 = 1
So, the answer is 1.
When you have the same base number in the numerator and denominator of a fraction, the value of that fraction is 1.
4^5 / 4^5 = 1
So, the answer is 1.
Start Fraction 4 superscript 7 baseline over 4 superscript 9 baseline End Fraction
A. –16
B. Start Fraction 1 over 16 End Fraction
C. one-eighth
D. 8
A. –16
B. Start Fraction 1 over 16 End Fraction
C. one-eighth
D. 8
B. Start Fraction 1 over 16 End Fraction
When you divide powers with the same base, you subtract the exponent in the denominator from the exponent in the numerator.
4^7 / 4^9 = 4^(7-9) = 4^(-2) = 1/16
So, the answer is Start Fraction 1 over 16 End Fraction.
When you divide powers with the same base, you subtract the exponent in the denominator from the exponent in the numerator.
4^7 / 4^9 = 4^(7-9) = 4^(-2) = 1/16
So, the answer is Start Fraction 1 over 16 End Fraction.
Multiply. Write the result in scientific notation.
(1.4 • 101)(8 • 104)
A. 9.4 • 104
B. 9.4 • 105
C. 1.12 • 105
D. 1.12 • 106
(1.4 • 101)(8 • 104)
A. 9.4 • 104
B. 9.4 • 105
C. 1.12 • 105
D. 1.12 • 106
C. 1.12 • 10^5
To multiply two numbers in scientific notation, you need to multiply their coefficients and add their exponents.
(1.4 • 10^1)(8 • 10^4) = 1.4 * 8 * 10^(1+4) = 11.2 * 10^5 = 1.12 * 10^6
So, the answer is 1.12 • 10^5.
To multiply two numbers in scientific notation, you need to multiply their coefficients and add their exponents.
(1.4 • 10^1)(8 • 10^4) = 1.4 * 8 * 10^(1+4) = 11.2 * 10^5 = 1.12 * 10^6
So, the answer is 1.12 • 10^5.
(1.1 ∙ 10–5)(3 ∙ 10–2)
A. 4.1 ∙ 10–7
B. 4.1 ∙ 1010
C. 3.3 ∙ 10–7
D. 3.3 ∙ 1010
A. 4.1 ∙ 10–7
B. 4.1 ∙ 1010
C. 3.3 ∙ 10–7
D. 3.3 ∙ 1010
C. 3.3 ∙ 10–7
To multiply two numbers in scientific notation, you need to multiply their coefficients and add their exponents.
(1.1 • 10^(-5))(3 • 10^(-2)) = 1.1 * 3 * 10^(-5-2) = 3.3 * 10^(-7)
So, the answer is 3.3 ∙ 10^-7.
To multiply two numbers in scientific notation, you need to multiply their coefficients and add their exponents.
(1.1 • 10^(-5))(3 • 10^(-2)) = 1.1 * 3 * 10^(-5-2) = 3.3 * 10^(-7)
So, the answer is 3.3 ∙ 10^-7.
Simplify the expression.
6t3 ∙ 6t3
A. 12t3
B. 12t6
C. 36t6
D. 36t9
6t3 ∙ 6t3
A. 12t3
B. 12t6
C. 36t6
D. 36t9
C. 36t6
When you multiply two expressions with the same base, you add their exponents.
6t^3 * 6t^3 = 6*6 * t^3+t^3 = 36t^6
So, the answer is 36t^6.
When you multiply two expressions with the same base, you add their exponents.
6t^3 * 6t^3 = 6*6 * t^3+t^3 = 36t^6
So, the answer is 36t^6.
Simplify the expression.
–x(5x – 4)
A. 4x2 – 5x
B. –5x – 4x
C. 5x + 4x
D. –5x2 + 4x
–x(5x – 4)
A. 4x2 – 5x
B. –5x – 4x
C. 5x + 4x
D. –5x2 + 4x
D. -5x^2 + 4x
To simplify, you need to distribute the negative sign across the parentheses and then multiply the terms.
-x(5x - 4) = -5x^2 + 4x
So, the answer is -5x^2 + 4x.
To simplify, you need to distribute the negative sign across the parentheses and then multiply the terms.
-x(5x - 4) = -5x^2 + 4x
So, the answer is -5x^2 + 4x.
Simplify the expression.
3k2(–2k2 – 4k + 7)
A. –6k3 – k + 10k
B. –6k4 – 12k3 + 21k2
C. k4 – k3 + 10k2
D. 6k4 – 12k3 + 10k2
3k2(–2k2 – 4k + 7)
A. –6k3 – k + 10k
B. –6k4 – 12k3 + 21k2
C. k4 – k3 + 10k2
D. 6k4 – 12k3 + 10k2
D. 6k4 – 12k3 + 10k2
To simplify, first distribute 3k^2 across the parentheses, then multiply the terms.
3k^2(-2k^2 -4k + 7) = -6k^4 -12k^3 + 21k^2
So, the answer is 6k^4 - 12k^3 + 10k^2.
To simplify, first distribute 3k^2 across the parentheses, then multiply the terms.
3k^2(-2k^2 -4k + 7) = -6k^4 -12k^3 + 21k^2
So, the answer is 6k^4 - 12k^3 + 10k^2.