Mathematics, 21.11.2020 04:20 brendaesme

WILL GIVE BRAINLIEST - 6TH GRADE MATHEMATICS Angie is showing her work in simplifying −7.9 + 8.2 − 3.4 + 2.1. Identify any errors in her work or in her reasoning.

StepWorkReasoning
−7.9 + 8.2 − 3.4 + 2.1Original problem
1−7.9 + 8.2 + (−3.4) + 2.1Additive inverse
2−7.9 + (−3.4) + 8.2 + 2.1Commutative property
3[−7.9 + (−3.4)] + (8.2 + 2.1)Associative property
4−11.3 + 10.3Simplify
5−1Simplify
She did not make any errors.
Step 1: She wrote −3.4 incorrectly as + (−3.4).
Step 2: She identified changing the order of the numbers as the commutative property, which is incorrect.
Step 3: She identified changing the grouping of the numbers as the associative property, which is incorrect.

Answers: 3

Show answers

Another question on Mathematics

Mathematics, 20.06.2019 18:04

Me find the missing dimension of a triangle height: 7 in., area: 21^2

Answers: 1

Answer

Mathematics, 21.06.2019 16:30

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Answers: 1

Answer

Mathematics, 21.06.2019 21:30

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

Answers: 1

Answer

Mathematics, 22.06.2019 02:00

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet

Answers: 2

Answer

You know the right answer?

WILL GIVE BRAINLIEST - 6TH GRADE MATHEMATICS Angie is showing her work in simplifying −7.9 + 8.2 −...

Questions