Kayla and Riley both solved the equation x+15 = 13+7, using substitution. Kayla says the answer is x = 20, and Riley says that answer is x=35. Which student is correct?
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1 point
Kayla
Riiley
Both
Neither
To solve the equation x + 15 = 13 + 7, first combine like terms 13 + 7 to get 20. Then subtract 15 from both sides of the equation to isolate the variable x. The equation becomes x = 20 - 15. Simplifying further, we get x = 5.
Since neither Kayla nor Riley obtained the correct answer of x = 5, neither student is correct. Therefore, the correct answer is neither.
An equation is shown.
36.8 = x + 7.3
What is the value of x?
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1 point
To solve the equation 36.8 = x + 7.3, we need to isolate the variable x by subtracting 7.3 from both sides of the equation. We get:
36.8 - 7.3 = x
Simplifying further, we have:
x = 29.5
Therefore, the value of x is 29.5.
What is the inverse operation of division?
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1 point
Addition
Subtraction
Divide
Multiply
The inverse operation of division is multiplication.
To solve an equation, what do you need to get by itself on one side of the equation? Select the best answer.
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1 point
variable
expressioms
coefficients
terms
To solve an equation, you need to get the variable by itself on one side of the equation.
Seana works at Five Below and makes $14 per hour. On his current paycheck, he worked h hours. If Anthony made a total of $322, how many hours did he work?
To find the number of hours Seana worked, we can divide the total amount of money he made ($322) by his hourly wage ($14 per hour).
Let's set up the equation:
h hours * $14/hour = $322
To solve for h, we divide both sides of the equation by $14:
h = $322 / $14
Simplifying the right side of the equation, we have:
h = 23
Therefore, Seana worked 23 hours.
Heidi is saving up for a new noise-canceling headset. It's on sale for $149.99. Heidi has $99 saved. How much more does she need to save before buying the headset?
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1 point