Ask question

Ask question

All categories

Norma-Jean [14]

2 years ago

12

please help and describe and correct the error in finding a solution of the equation in two variables! i will mark you brainlies

t !!!!

2 answers:

Angelina_Jolie [31]2 years ago

6 0

Answer:

see below

Step-by-step explanation:

The student put 5 in for y and 1 in for x. It should be x=5 and y =1

y = 3x+2

1 = 3*5 +2

1 = 15+2

1 = 17

This is not true so this is not a solution

Black_prince [1.1K]2 years ago

4 0

Answer:

see below

Step-by-step explanation:

The student put 5 in for y and 1 in for x. It should be x=5 and y =1

y = 3x+2

1 = 3*5 +2

1 = 15+2

1 = 17

This is not true so this is not a solution

You might be interested in

Find the roots of h(t) = (139kt)^2 − 69t + 80

Sonbull [250]

Answer:

The positive value of $k$ will result in exactly one real root is approximately 0.028.

Step-by-step explanation:

Let $h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80$ , roots are those values of $t$ so that $h(t) = 0$ . That is:

$19321\cdot k^{2}\cdot t^{2}-69\cdot t + 80=0$ (1)

Roots are determined analytically by the Quadratic Formula:

$t = \frac{69\pm \sqrt{4761-6182720\cdot k^{2} }}{38642}$

$t = \frac{69}{38642} \pm \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} }$

The smaller root is $t = \frac{69}{38642} - \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} }$ , and the larger root is $t = \frac{69}{38642} + \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} }$ .

$h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80$ has one real root when $\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} = 0$ . Then, we solve the discriminant for $k$ :

$\frac{80\cdot k^{2}}{19321} = \frac{4761}{1493204164}$

$k \approx \pm 0.028$

The positive value of $k$ will result in exactly one real root is approximately 0.028.

7 0

1 year ago

mojhsa [17]

Answer:

cost = 8p + 5

Step-by-step explanation:

$8*[number of pizzas] + $5 delivery fee

$8p + $5

8p + 5

cost = 8p + 5

3 0

1 year ago

Read 2 more answers

10 × (8 + 3) – 6 + [8 × (3 + 2)]

Debora [2.8K]

Answer:

The answer is 144 :)

8 0

2 years ago

Read 2 more answers

Write the steps for how to use a number line to multiply a 2 digit number by 20. Give an example

lidiya [134]

Draw the number line then put the numbers on the number line by twos. Fore example, 2-4-6-8-10

8 0

2 years ago

Place the numbers in order from greatest to least.90.9890.08990.989.8990

padilas [110]

EXPLANATION:

The decimal number that is greater is the one with the largest integer part. If they have the same integer part, the first different decimal place is compared.

Now we are going to order the numbers of the exercise,

The correct order is:

-90.98

-90.9

-90.089

-90

-89.89

6 0

4 months ago