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Reptile [31]
3 years ago
8

-2/3 divided by (-1/2)

Mathematics
2 answers:
Alja [10]3 years ago
8 0

Answer: +4/3

Explanation: It's important to understand that dividing by a fraction

means the same thing as multiplying by the reciprocal of that fraction.

In other words, we can simply change the division symbol

to multiplication and flip the second fraction.

So we can rewrite this problem as -2/3 · -2/1.

We can't cross-cancel anything.

Before multiplying, take note of your signs.

A negative times a negative is a positive,

so we know that our answer will be positive.

Multiplying across the numerators and denominators, we have +4/3.

denis23 [38]3 years ago
7 0

Answer:

4/3

Step-by-step explanation:

multiply by the reciprocal

-\frac{2}{3} × -\frac{2}{1} = \frac{4}{3}

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Lin runs 5 laps around a track in 6 minutes. How many minutes per lap is that? ___minutes How many laps per minute is that? ___
snow_lady [41]

Answer:

a. 1.2 minutes

b. 0.83 laps

c. 25.2 minutes

Step-by-step explanation:

Lin runs 5 laps around a track in 6 minutes.

a. How many minutes per lap is that?

5 laps = 6 minutes

1 laps = x minutes

Cross Multiply

x minute × 5 laps = 6 minutes × 1 laps

x minute = 6 minutes × 1 laps/5 laps

x laps = 1.2 minutes

Hence, it is 1.2 minutes per lap

b. How many laps per minute is that?

6 minutes = 5 laps

1 minute = x laps

Cross Multiply

6 minutes × x laps = 1 minute × 5 laps

x laps = 1 minute × 5 laps/6 minutes

x laps = 0.8333333333 laps

Hence, it is 0.83 laps per minute.

c. If Lin runs 21 laps at the same rate,

5 laps = 6 minutes

21 laps = x minutes

Cross Multiply

x minute × 5 laps = 6 minutes × 21 laps

x minute = 6 minutes × 21 laps/5 laps

x laps = 25.2 minutes

Hence, it takes her 25.2 minutes

3 0
3 years ago
Someoneee helppp meee plzzzz
shepuryov [24]
Sorry I’m wrong I took geometry like 3 years ago so I might forget some

11. SSS
12. AAS
13 Not possible
14. ASA
15. SAS
16.ASA
8 0
3 years ago
Simplify and rationalize denominator<br>3√3x^5y^4÷8x​
vladimir1956 [14]

Answer:

15jnzks.sjnsjdkdksksk

4 0
3 years ago
Please help me with this Geometry question
Lelu [443]

Answer:

Given that JN was bisected, JL ≅ LN

Given that KM was bisected, KL ≅ ML

∠JLK ≅ ∠MLN because of vertical angles.

∠JLK is contained by JL and KL.

∠MLN is contained by ML and LN.

Therefore ΔJKL ≅ ΔNML by the SAS postulate.

Step-by-step explanation:

The SAS postulate states that when you know two triangles have an equal angle, and that angle is formed by two sides that are equal in both triangles, the two triangles are congruent.

When a line is bisected, it means it was cut in two equal parts.

Since two lines were bisected and each form a side in the triangles, two sides are congruent.

The contained angles, ∠JLK and ∠MLN, are equal because of vertical angles. Vertical angles occur when two straight lines intersect. Angles that are opposite to each other are equal in all cases.

7 0
3 years ago
609.9 is 85% of what number
castortr0y [4]
Hi

609.9 ⇒ 85%
x ⇒ 100%

85x = 100·(609.9)
85x = 60,990
x = (60,990)/85
x = 717.5294117... ≈ 717.53

85% of 717.53 ⇒ 0.85 × 717.53 = 609.9005 ≈ 609.9

Answer: 717.53
7 0
3 years ago
Read 2 more answers
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