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grigory [225]
3 years ago
7

I have multiple question but for that i will give u lots of points and who ever gets it first ALL OF THEM will also get brainles

t :)
1:




2:






3:






4:






5:

Mathematics
1 answer:
Maslowich3 years ago
8 0

Answer:

1. slope is 1/2

2. slope is 1/3

3. slope is 2/3

4. slope is 3

5. y=3x-2

Step-by-step explanation:

You might be interested in
Select the correct answer.
EleoNora [17]

Answer:

Option (B)

Step-by-step explanation:

There are two lines on the graph representing the system of equations.

First line passes through two points (-3, 1) and (-2, 3).

Slope of the line = \frac{y_2-y_1}{x_2-x_1}

                           = \frac{3-1}{-2+3}

                       m = 2

Equation of the line passing through (x', y') and slope = m is,

y - y' = m(x - x')

Equation of the line passing through (-3, 1) and slope = 2 will be,

y - 1 = 2(x + 3)

y = 2x + 7 ----------(1)

Second line passes through (0, 1) and (-1, 4) and y-intercept 'b' of the line is 1.

Let the equation of this line is,

y = mx + b

Slope 'm' = \frac{y_2-y_1}{x_2-x_1}

               = \frac{4-1}{-1-0}

               = -3

Here 'b' = 1

Therefore, equation of the line will be,

y = -3x + 1 ---------(2)

From equation (1) and (2),

2x + 7 = -3x + 1

5x = -6

x = -\frac{6}{5}

x = -1\frac{1}{5}

From equation (1),

y = 2x + 7

y = -\frac{12}{5}+7

  = \frac{-12+35}{5}

  = \frac{23}{5}

  = 4\frac{3}{5}

Therefore, exact solution of the system of equations is (-1\frac{1}{5},4\frac{3}{5}).

Option (B) will be the answer.

5 0
3 years ago
Express .0000257 in scientific notation
sukhopar [10]

Answer:

2.57 x 10^(-5)

Step-by-step explanation:

you have to move the comma sign in front of the first number considering 0 as a non-number.

6 0
3 years ago
If the graph of f(x) = x is shifted up 9 units, what would be the equation of the new graph?
MariettaO [177]

Answer:

f(x) = x + 9

Step-by-step explanation:

y = f(x) + C C > 0 moves it up

To shift it up 9 units

f(x) = x + 9

7 0
3 years ago
A.Mary wrote all the integers from 1 to 19. How many numbers did she write?
pentagon [3]

Answer:

A. She wrote 19 numbers

B. She wrote 12 numbers

C. She wrote 29 digits

Step-by-step explanation:

To find haw many numbers from x to y subtract x and y and then add 1

  • Ex: There are 6 numbers from 1 to 6 because (6 - 1) + 1 = 6 (1, 2, 3, 4, 5, 6)

To find how many numbers between x and y subtract x and y then subtract 1

  • Ex: There are 4 numbers between 1 and 6 because (6 - 1) - 1 = 4 (2, 3, 4, 5)

The numbers from 1 to 9 have one digit and from 10 to 99 have two digits

A.

∵ Mary wrote all the integers from 1 to 19

∵ (19 - 1) + 1 = 19

∴ She wrote 19 numbers

B.

∵ Rena wrote all the integers from 1 to 12

∵ (12 - 1) + 1 = 12

∴ She wrote 12 numbers

C.

∵ Mary wrote all the integers from 1 to 19

∵ From 1 to 9 the numbers have one digit

∵ There are 9 numbers from 1 to 9 because (9 - 1) + 1 = 9

∴ The number of digits from 1 to 9 = 9 × 1 = 9 digits

∵ There are 10 numbers from 10 to 19 because (19 - 10) + 1 = 10

∵ From 10 to 19 each number has 2 digits

∴ The number of digits from 10 to 19 = 10 × 2 = 20 digits

∴ The number of digits from 1 to 19 = 9 + 20 = 29 digits

∴ She wrote 29 digits

4 0
3 years ago
In a square PQRS, if PQ = (2x + 3) cm and QR = (3x-5)cm then the value of X is...​
Vladimir79 [104]

Answer:

⇛x=8cm.

Step-by-step explanation:

Given that

PQRS is a square and PQ = (2x+3) cm

and QR = (3x-5) cm

We know that

All sides are equal in a square .

⇛ PQ = QR = RS = PS

⇛ 2x+3 = 3x-5

⇛ 3+5 = 3x-2x

⇛ 8 = x

⇛ x = 8

Therefore, The value of x = 8 cm.

5 0
2 years ago
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