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3 years ago

Help please:(idk how to do it at all

Mathematics

1 answer:

german3 years ago

4 0

Y = 1/3x - 5
Since graph is linear, find 3 points
(0,5), (3,-4), (6,-3)
Plot these points into graph and draw a straight line through them

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Please help! forgot how to subtract integers!

DedPeter [7]

Answer: -15

Step-by-Step Explanation:
1) Reorder the terms
36-51
2) Use the rule: a-b=-(b-a)
-(51-36)
3) Use the algorithm method
51
-36
——
15
4) After simplification, we have:
-(51-36)=-15
5)Therefore, -51+36=-15
-15

6 0

3 years ago

there are 20 balls numbered 1 to 20.in a bag.if a person selects one at random,what is the probability that the number printed o

frozen [14]

Prime numbers > than 5 are 7, 11, 13, 17, and 19 so 5/20, or 1/4, or 25% chance

4 0

3 years ago

Graph the line with slope-2/3<br> passing through the point (-5, -4),

Orlov [11]

Answer:

The figure is attached down

Step-by-step explanation:

To graph a line you must have its equation

The form of the linear equation is y = m x + b, where

m is its slope
b is the y-intercept (y at x = 0)

∵ The slope of the line is $-\frac{2}{3}$

∴ y = $-\frac{2}{3}$ x + b

- To find b substitute x and y in the equation by the coordinates

of a point on the line

∵ The line passing through point (-5 , -4)

∴ x = -5 and y = -4

∵ -4 = $-\frac{2}{3}$ (-5) + b

∴ -4 = $\frac{10}{3}$ + b

- Subtract $\frac{10}{3}$ from both sides

∴ $-\frac{22}{3}$ = b

∴ y = $-\frac{2}{3}$ x - $\frac{22}{3}$

To draw the line substitute x by any two values and find their ys

∵ x = -2

∴ y = $-\frac{2}{3}$ (-2) - $\frac{22}{3}$

∴ y = -6

∴ The line passing through point (-2 , -6)

∵ x = 1

∴ y = $-\frac{2}{3}$ (1) - $\frac{22}{3}$

∴ y = -8

∴ The line passing through point (1 , -8)

∵ x = 4

∴ y = $-\frac{2}{3}$ (4) - $\frac{22}{3}$

∴ y = -10

∴ The line passing through point (4 , -10)

Now we can make a table to draw the line

→ x : -5 : -2 : 1 : 4

→ y : -4 : -6 : -8 : -10

Plot the points on the graph paper and draw the line

<em>Look to the attached graph</em>

4 0

4 years ago

A $\textit{palindrome}$ is a positive integer which reads the same forward and backward, like $12321$ or $4884$. How many $4$-di

Norma-Jean [14]

There are 90 4-digit palindromes

<h3>What are palindromes?</h3>

Palindromes are numbers whose reverse is the same as the original number

<h3>How to determine the count of 4-digit palindromes</h3>

Since the digit is 4, then

The first digit of the palindrome can be any of 1 to 9 (i.e. 9 digits)
The second digit can be any of 0 - 9 (i.e. 10 digits)
The third digit must be the second digit (i.e. 1 digit)
The last digit must be the first digit (i.e. 1 digit)

So, the total number of digits is:

$n =9 * 10 * 1 * 1$

Evaluate the product

$n =90$

Hence, there are 90 4-digit palindromes.

Read more about numbers at:

brainly.com/question/251701

4 0

3 years ago

When completing the square on the equation c2 + 110 = 12, the resulting solution is:<br> It

Delvig [45]

Answer:

$c=1$ and $c=-12$

Step-by-step explanation:

The correct equation is:

$c^2+11c=12$

To solve by completing the square method.

Solution:

We have:

$c^2+11c=12$

In order to solve by completing the square method we will carry out the following operations to the given equation to get a perfect square binomial.

We can write as:

$c^2+2.\frac{11}{2}c=12$

$c^2+2.\frac{11}{2}c+(\frac{11}{2})^2-(\frac{11}{2})^2=12$

$(c+\frac{11}{2})^2-(\frac{11}{2})^2=12$ [As $c^2+2.\frac{11}{2}c+(\frac{11}{2})^2=(c+\frac{11}{2})^2$ ]

Adding both sides by $(\frac{11}{2})^2$

$(c+\frac{11}{2})^2-(\frac{11}{2})^2+(\frac{11}{2})^2=12+(\frac{11}{2})^2$

$(c+\frac{11}{2})^2=12+\frac{121}{4}$

Taking LCD to add fraction.

$(c+\frac{11}{2})^2=\frac{48}{4}+\frac{121}{4}$

$(c+\frac{11}{2})^2=\frac{169}{4}$

Taking square root both sides.

$\sqrt{(c+\frac{11}{2})^2}=\sqrt{\frac{169}{4}}$

$c+\frac{11}{2}=\pm\frac{13}{2}$

Subtracting both sides by $\frac{11}{2}$ :

$c+\frac{11}{2}-\frac{11}{2}=\pm\frac{13}{2}-\frac{11}{2}$

$c=\pm\frac{13}{2}-\frac{11}{2}$

So, we have:

$c=\frac{13}{2}-\frac{11}{2}$ and $c=-\frac{13}{2}-\frac{11}{2}$

$c=\frac{2}{2}$ and $c=\frac{-24}{2}$

$c=1$ and $c=-12$ (Answer)

6 0

4 years ago