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3 years ago

I WILL MARK BRAINLIEST!!! 45 POINTS!!!! Solve using substitution y= -8x-6 y= -3x +4

Mathematics

1 answer:

Nuetrik [128]3 years ago

3 0

Given :

y= -8x-6

y= -3x +4

By solving it, we get,

-8x-6 = -3x+4

$= > x = - 2$

Substituting the value of "x" in second given equation,

$y = - 3x + 4$

$= > y = - 3 \times ( - 2) + 4$

By solving it, we get,

$y = 10$

Hence, the values are :-

$x = - 2 \\ y = 10$

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Lucas has 18 coins. there are three times as many pennies as dimes and twice as many nickels as dimes. the number of each coin i

balu736 [363]

18=p+d+n, 3p=d, 2n=d
The lowest number that is divisible by 3&2 is 6 so, there is 6 nickels.
There is 6 nickels and there is half of that in dimes, 3 dimes.
There is three times the amount of pennies of dimes. 3*3=9. There is 9 pennies.
6 nickels + 3 dimes + 9 pennies= 18 coins

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4 years ago

A record store owner assesses customers entering the store as high school age, college age,

Eva8 [605]

Step-by-step explanation:

(a) P = (0.3)(0.2) + (0.5)(0.6) + (0.2)(0.8)

P = 0.52

(b) (0.5)(0.6) = 0.3

P = 0.3 / 0.52

P = 0.58

3 0

3 years ago

11/21 as a decimal and a percent

pochemuha

11/21 written as a decimal would be 0.52381 and in percent, it would be 52.381%.

To solve percent, since the total or 1/1 is 100%, we have to remember that the answer is less than 100%. So, we move 2 decimal places right to make it into percent. Then, the answer is 52.381.

To solve percent, you would do 100/21. Then, you would get 4.7619047619. You multiply that by 11 and get 52.381. But, you have to move 2 places left since fractions are tens, hundreds. So, you would get 0.52381.

8 0

3 years ago

How does y=-x^2 reflect compared to the parent function

pogonyaev

y=-x^2 is a parent function.

8 0

3 years ago

A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a pers

Arturiano [62]

Answer:

A person who watches 8.5 hours of TV can do 30.4 sit ups.

Step-by-step explanation:

The regression equation is used to predict or estimate the value of the response (or dependent) variables using the information about the explanatory (or predictor) variables.

The general form of a regression equation is:

$y=ax+b$

Here,

y = dependent variable

x = independent variable

a = intercept

b = slope

The regression equation representing the relationship between hours of TV watched per day (x) and number of sit ups a person can do (y) is:

$y=-0.74x+36.359$

Compute the number of sit ups a person who watches 8.5 hours of TV can do as follows:

$y=-0.74x+36.359$

$=(-0.74\times 8.5)+36.359\\=-6.29+36.659\\=30.369\\\approx 30.4$

Thus, a person who watches 8.5 hours of TV can do 30.4 sit ups.

6 0

3 years ago