2x + 5 = 10
What is the first operation used in solving this equation?
Responses
A additionaddition
B divisiondivision
C multiplicationmultiplication
D subtraction
9 answers
D subtraction
Miranda wants to buy as many collectible dolls as possible, for $2.50 each. If she has $45.00 to spend, how many dolls can she buy?
Which equation BEST represents this situation?
Responses
A 45x = 2.545x = 2.5
B 2.5x = 452.5x = 45
C x + 2.5 = 45x + 2.5 = 45
D x + 45 = 2.5
Which equation BEST represents this situation?
Responses
A 45x = 2.545x = 2.5
B 2.5x = 452.5x = 45
C x + 2.5 = 45x + 2.5 = 45
D x + 45 = 2.5
B 2.5x = 45
Tim is measuring the weight (in ounces) of a substance for a science experiment. Tim added a mystery substance (m) to his experiment. Tim used the equation 12.93 + m = 17.0 to find out how much he added. How much of the mystery substance (m) did Tim add to his experiment?
Responses
A 4.07 ounces4.07 ounces
B 4.97 ounces4.97 ounces
C 5.03 ounces5.03 ounces
D 5.17 ounces
Responses
A 4.07 ounces4.07 ounces
B 4.97 ounces4.97 ounces
C 5.03 ounces5.03 ounces
D 5.17 ounces
To find the value of the mystery substance (m), we need to isolate it on one side of the equation. To do this, we can subtract 12.93 from both sides:
12.93 + m - 12.93 = 17.0 - 12.93
Simplifying the equation, we have:
m = 17.0 - 12.93
m = 4.07
Therefore, Tim added 4.07 ounces of the mystery substance to his experiment.
The correct answer is A) 4.07 ounces.
12.93 + m - 12.93 = 17.0 - 12.93
Simplifying the equation, we have:
m = 17.0 - 12.93
m = 4.07
Therefore, Tim added 4.07 ounces of the mystery substance to his experiment.
The correct answer is A) 4.07 ounces.
If you take Coleman's test grade and divide by 2 and add 27, you get 67. Write and solve an equation to find Coleman's test grade.
Responses
A 2020
B 4747
C 8080
D 188
Responses
A 2020
B 4747
C 8080
D 188
To find Coleman's test grade, we can set up an equation using the given information.
Let x be Coleman's test grade.
According to the problem, if we divide Coleman's test grade by 2 and add 27, we get 67. We can translate this into an equation:
(x / 2) + 27 = 67
To solve this equation, we can first subtract 27 from both sides:
(x / 2) = 40
Next, we can multiply both sides by 2 to isolate x:
x = 80
Therefore, Coleman's test grade is 80.
The correct answer is not among the given options.
Let x be Coleman's test grade.
According to the problem, if we divide Coleman's test grade by 2 and add 27, we get 67. We can translate this into an equation:
(x / 2) + 27 = 67
To solve this equation, we can first subtract 27 from both sides:
(x / 2) = 40
Next, we can multiply both sides by 2 to isolate x:
x = 80
Therefore, Coleman's test grade is 80.
The correct answer is not among the given options.
4 - 2x = 10
Responses
A -7-7
B -3-3
C 00
D 33
E 7
Responses
A -7-7
B -3-3
C 00
D 33
E 7
To solve the equation 4 - 2x = 10, we need to isolate the variable x. Let's go through the steps:
1. Start with the equation: 4 - 2x = 10.
2. Subtract 4 from both sides to get rid of the constant term on the left side:
4 - 4 - 2x = 10 - 4.
Simplifying the equation, we have:
-2x = 6.
3. Divide both sides of the equation by -2 to solve for x:
-2x / -2 = 6 / -2.
Simplifying further, we have:
x = -3.
Therefore, the correct answer is B) -3.
1. Start with the equation: 4 - 2x = 10.
2. Subtract 4 from both sides to get rid of the constant term on the left side:
4 - 4 - 2x = 10 - 4.
Simplifying the equation, we have:
-2x = 6.
3. Divide both sides of the equation by -2 to solve for x:
-2x / -2 = 6 / -2.
Simplifying further, we have:
x = -3.
Therefore, the correct answer is B) -3.