Ariana is a citizen scientist for a monarch butterfly project. Every week, she visits a local patch of milkweed and counts the number of monarch larvae on the plants. Last week, Ariana didn't count many larvae. This week, she counts 19 larvae on the milkweed. For both weeks, Ariana's total count is 26 larvae.Which equation can you use to find the number of larvae n Ariana counted last week?Choices:(A)19n=26(B)n+19=26(C)n−19=26(D)260Solve this equation for n to find the number of larvae Ariana counted last week.262 larvae
Q. Ariana is a citizen scientist for a monarch butterfly project. Every week, she visits a local patch of milkweed and counts the number of monarch larvae on the plants. Last week, Ariana didn't count many larvae. This week, she counts 19 larvae on the milkweed. For both weeks, Ariana's total count is 26 larvae.Which equation can you use to find the number of larvae n Ariana counted last week?Choices:(A)19n=26(B)n+19=26(C)n−19=26(D)260Solve this equation for n to find the number of larvae Ariana counted last week.262 larvae
Set Up Equation: To find the number of larvae Ariana counted last week, we need to set up an equation that relates last week's count n and this week's count 19 to the total count for both weeks 26. The correct equation should allow us to solve for n, the number of larvae counted last week.
Eliminate Incorrect Choices: Looking at the choices, we can eliminate (A) because dividing n by 19 does not make sense in this context. We can also eliminate (C) because subtracting 19 from n suggests that this week's count would be subtracted from last week's count, which is not the case. Choice (D) is incorrect because multiplying 19 by n implies that the count for both weeks is the same, which is not given in the problem. The correct choice is (B) n+19=26 because it represents adding this week's count (19) to last week's count (n) to get the total count (26).
Solve Equation: Now we solve the equation from choice (B): n+19=26. To isolate n, we need to subtract 19 from both sides of the equation. n+19−19=26−19n=7
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