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4 years ago

12

2x - 2y = 2 and 7 = -x

2 answers:

Nastasia [14]4 years ago

7 0

2x - 2y = 2

2(-y) - 2y = 2

- 4y = 2

y = - 2/4 = - 1/2 = - 0,5

y = - 0,5

x = 0,5

Elina [12.6K]4 years ago

6 0

Answer:

y = -6

Step-by-step explanation:

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Elia rode her bicycle from her house to the beach at a constant speed of 18 kilometers per hour, and then rode from the beach to

sasho [114]

Answer:

$\displaystyle b=0.45\ h$

$\displaystyle p=0.55\ h$

Step-by-step explanation:

<u>Cinematics </u>

When an object moves at a constant speed, it can be computed as

$\displaystyle v=\frac{x}{t}$

Where x is the distance traveled and t the time needed to complete it at the constant speed v

If we wanted to compute t from the equation above, then

$\displaystyle t=\frac{x}{v}$

Elia rode her bicycle from her house to the beach at 18 km/h and then from the beach to the park at 15 km/h, taking 1 hour in the whole travel, each distance being equal. If we call b as the number of hours it took Elia to ride from her house to the beach, and p the number of hours it took her to ride from the beach to the park, then we can compute

$\displaystyle b=\frac{x}{18}$

$\displaystyle p=\frac{x}{15}$

The question doesn't ask for something in particular, so I'm helping you by solving the complete problem. We know the total time is 1 hour, so

$\displaystyle b+p=1$

Replacing b and p

$\displaystyle \frac{x}{18}+\frac{x}{15}=1$

Multiplying by 90

$\displaystyle \frac{90x}{18}+\frac{90x}{15}=90$

Simplifying and solving for x

$\displaystyle 5x+6x=90$

$\displaystyle 11x=90$

$\displaystyle x=\frac{90}{11}=8.18\ km$

We finally compute b and p

$\displaystyle b=\frac{8.18}{18}=0.45\ h$

$\displaystyle p=\frac{8.18}{15}=0.55\ h$

8 0

4 years ago

Which table represents a linear function?

AlladinOne [14]

The rate of change for the function on the table is; 15 grapes eaten per minute.

<h3>What is the rate of change of the function described by the table?</h3>

It follows from the complete question that the table given indicates that;

after 1min, 15 grapes had been eaten,

after the next minute, 30 grapes had eaten,

after the 3rd minute, 45 grapes had already been eaten.

On this note, it is conclusive that the rate of change of the function represented by the table is; 15 grapes eaten per minute.

Read more on rate of change;

brainly.com/question/7220852

#SPJ1

4 0

2 years ago

Andy is one fourth as old as his grandfathervwho is 76 years old write an eqution to determinecwethter andy is 19 or 22 years ol

Savatey [412]

Well, 22*4 is 88 so you can assume Andy isn't 22 since it says his grandpa is 76.

76/4=19 or 19*4=76

5 0

3 years ago

Are these triangles congruent, if yes, why? <br><br> ANSWER QUICK PLEASE

fredd [130]

Yes, because they have the same measurements. the lines show they are the same

7 0

3 years ago

Read 2 more answers

What is 150 divided by 625 step by step

Levart [38]

Answer:

150 dived by 625 is 0.24 I'm not sure how to explain it

6 0

3 years ago