All categories

3 years ago

What do the following two equations represent -4-4y=-5 4x-4y=1

Mathematics

1 answer:

Alex73 [517]3 years ago

6 0

Step-by-step explanation:

Get the value of y first from the first equation.. Replace the value of y on the second equation to get the value of x

You might be interested in

Which set of angles are complementary

Deffense [45]

Answer:

A. <ECF and <BCF

Step-by-step explanation:

Complementary angles are angles that add up to give 90°

m<BCE = m<BCA = 90° (right angles)

m<ECF + m<BCF = m<BCA

m<ECF + m<BCF = 90° (Substitution)

Therefore, <ECF and <BCF are complementary angles.

6 0

3 years ago

Explain C = 15 + 0.6Yd

alekssr [168]

Explain what exactly ? are we solving for a variable ?

6 0

3 years ago

kelly is using a bucket to fill up a barrel with water from a well. The barrel holds 25.5 liters.the bucket holds 800 millileter

SVEN [57.7K]

To determine how much of the barrel is left to fill, you must subtract the amount of water already in it from the total mass of the bucket.

25.5 - 5.2 = 20.3 Litres

In order to the fill the entire barrel, Kelly must collect 20.3 Litres of water. You must then covert the measurement from litres to millilitres so that the bucket and barrel are measured in the same units.

20.3L = 20300mL

You must then divide the amount of space left by the mass of the bucket. This will determine the least number of buckets needed to fill the barrel.

20300 ÷ 800 = 25.375

That means the you would have to do a minimum on 25.375 buckets to fill the barrel, or 26.

Hope this helps :)

6 0

4 years ago

Expedia would like to test the hypothesis that the average round-trip airfare between Philadelphia and Paris is higher for a fli

leonid [27]

Answer:

(b) 32

Step-by-step explanation:

From the information given :

sample mean of Philadelphia μ₁ = $1240

Sample size of Philadelphia n₁ = 15

Sample Standard deviation σ₁ = $270

sample mean of Paris μ₂ = $1,060

Sample size of Paris n₂ = 19

Sample Standard deviation of Paris σ₂ = $240

If Population 1 is defined as flights originating in Philadelphia and Population 2 is defined as flights originating in Paris;

the degrees of freedom for this hypothesis test can be calculated as;

degree of freedom df = n - 1

degree of freedom for both hypothesis test = (n₁ - 1 + n₂ -1)

degree of freedom for both hypothesis test = (n₁ + n₂ - 2)

degree of freedom for both hypothesis test = ( 15 + 19 - 2)

degree of freedom for both hypothesis test are  32 

3 0

3 years ago

If 25 students took an exam and 4 of them failed, what percent of them passed?

lisabon 2012 [21]

If 25 students took an exam and 4 of the students that took the exam failed, what percent of the students passed?

To find out how many students passed, we can subtract 4 from 25 and we will get a difference of 21.

The fraction $\frac{21}{25}$ represents the number of students who passed the exam out of all the students.

To find out what percent of the students passed, we can turn $\frac{21}{25}$ into a percent.

21 ÷ 25 = 0.84

0.84 × 100 = 84%

Therefore, 84% of the students who took the exam passed.

5 0

3 years ago