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zalisa [80]
2 years ago
12

Which situation can be represented by the expression -2-5−2−5minus, 2, minus, 5?

Mathematics
1 answer:
pychu [463]2 years ago
6 0

The situation that represents the expression 2 - 5 is (a) the temperature was 2°C and has decreased by 5°C

<h3>How to determine the situation?</h3>

The expression is given as:

2 - 5

When the expression illustrates change in temperature, the interpretation can be:

An initial temperature of 2°C decreases by 5°C

Hence, the situation that represents the expression 2 - 5 is (a) the temperature was 2°C and has decreased by 5°C

Read more about expressions at:

brainly.com/question/723406

#SPJ1

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A driver wants to gauge the fuel efficiency of
WITCHER [35]

Answer: Y = -2X + 105

Step-by-step explanation: let speed = x and mpg = y

Using linear equation

Y = MX +c

M = dy/dt = (15 - 25)/( 40 - 45) =

-10/5 = -2

When y = 15 , x = 45

15 = -2(45) + c

15 = -90 + c

C = 105

The model linear equation will be

Y = -2X + 105

6 0
3 years ago
Read 2 more answers
Find the sum and express it in simplest form.<br>(6u - 7c - 6) + (-2u + 4c) ​
Vesnalui [34]

Answer:

4u - 3c - 6

Step-by-step explanation:

Remove the parentheses and combine like factors.

(6u - 7c - 6) + (-2u + 4c)

6u - 7c - 6 - 2u + 4c

4u - 3c - 6

5 0
3 years ago
For what values of x and y is the equation (x2 + y2)2 = (x2 – y2)2 + (2xy)2 true?
denis-greek [22]

Answer:

A) all values of x, and all values of y

B) (3a + 4b) (9a² − 12ab + 16b²)

Step-by-step explanation:

(x² + y²)² = (x² − y²)² + (2xy)²

x⁴ + 2x²y² + y⁴ = x⁴ − 2x²y² + y⁴ + 4x²y²

x⁴ + 2x²y² + y⁴ = x⁴ + 2x²y² + y⁴

27a³ + 64b³

(3a)³ + (4b)³

(3a + 4b) (9a² − 12ab + 16b²)

6 0
3 years ago
Ted analyzes how much sugar is in 3 popular candy bars. He records the data on the line plot below.
Fiesta28 [93]

Answer: 81 1/2

to determine the total amount of sugar we need to add

21 1/2 + 30 +30

^add the whole numbers the. add the fractions (21 +30+30) + (1/2)<<<

=81 + 1/2

which is equal to

81 1/2

4 0
2 years ago
A graduate school entrance exam has scores that are normally distributed with a mean of 560 and a standard deviation of 90. What
9966 [12]

26.8% of examinees will score between 600 and 700.

This question is based on z score concept.

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations from the mean. If a Z-score is 0, it indicates that the data point's score is identical to the mean score.

z={x-\mu  \over \sigma }

where:

μ is the mean

σ is the standard deviation of the population

Given:

μ = 560

σ = 90

For

600≤ X≤700

for x = 700

Z score =x - μ/σ

=(700 - 560)/90

      = 1.55556

P-value from Z-Table:

P(560<x<700) = P(x<700) - 0.5 = 0.44009

for x = 600

Z score =x - μ/σ

=(600 - 560)/90

      = 0.44444

P-value from Z-Table:

P(560<x<600) = P(x<600) - 0.5 = 0.17164

∴ P(600<x<700) = P(560<x<700) - P(560<x<600)

                           = 0.44009 - 0.17164

                          =0.26845

∴26.8% percentage of examinees will score between 600 and 700.

Learn more about Z score here :

brainly.com/question/15016913

#SPJ4

4 0
1 year ago
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