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3 years ago

Can someone check this one for me if this is right? Which best explains why the given lines are or are not parallel?

Mathematics

2 answers:

ASHA 777 [7]3 years ago

4 0

Pretty sure it could be B

eimsori [14]3 years ago

3 0

answer : the answer is a

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Solving special systems<br> {y=1/2x+4<br> {-1/2x+y=-5

ryzh [129]

Answer:

no solution

Step-by-step explanation:

Given the 2 equations

y = $\frac{1}{2}$ x + 4 → (1)

- $\frac{1}{2}$ x + y = - 5 → (2)

Substitute y = $\frac{1}{2}$ x + 4 into (2)

- $\frac{1}{2}$ x + $\frac{1}{2}$ x + 4 = - 5 , that is

4 = - 5 ← not possible

This indicates the system has no solution

7 0

3 years ago

Which operations are the most efficient to use to solve the problem and what is the solution? Lucas is making a banner that has

ivolga24 [154]

So, first what we should do is divide 2,046 by 62 to find the width of Lucas's banner.

2,046 / 62 = 33 The width of Lucas's banner is 33 cm.

Which means if the width of Emily's banner is 3x that:

3 x 33 = 99 Emily's banner is 99 cm in width.

So, your 2 answers are: 99 cm, division and multiplication. ;)

3 0

3 years ago

When asked to write a point slope equation for a line passing through the points (-4,-7) and (3,2) a student wrote y-2=-9/7(x-3)

AleksAgata [21]

First let's find the slope
Slope formula:
$\frac{y_2-y_1}{x_2-x_1} =slope$
Given the two coordinates:
(-4,-7) (3,2)
x1,y1 x2,y2

Plug these numbers into the formula
$\frac{2-(-7)}{3-(-4)} = \frac{9}{7}$
In this case the mistake that was made was that the student wrote the slope negative instead of positive
Final answer:
<span>y-2=9/7(x-3)</span>

8 0

3 years ago

The variable z is inversely proportional to x. When x is 3, z has the value 2.

kirill [66]

Answer:

z = 6/13

Step-by-step explanation:

The new value of x is 13/3 times the old value. Since z is inversely proportional to x, it will be multiplied by the inverse of that, 3/13.

2 × 3/13 = 6/13 . . . . value of z when x=13

3 0

3 years ago

Choose an integer from 1 to 2400 , what is the probabilty that the integer can not be divided by 6 and 8?

Vlad1618 [11]

Answer:

P=633/800

Step-by-step explanation:

The total number of integers from 1 to 2400 is 2400.

As understand we are looking for the numbers which can be divided at least by one of the numbers 6 or 8. Lets call all integers which can be divided by 6 or by 8 " black" integers and others " white" integers.

For example 6 can be divided by 6, however can not be divided by 8. However it is divided by 6 so we have to 6 belongs to " black" untegers.

The number of integers which can be divided by 6 is

2400:6=400 (1st sheet of black integers)

The number of integers which can be divided by 8 is 2400:8=300 (2nd shhet of black numbers).

So total amount of " black" integers= 400+300=700. However some of these integers can be divided both as by 6 as by 8.

These integers heve been included as to sheet 1 as to sheet 2. ANother words these integers have been included twice. SO we have to find the

total number of such integers and deduct them from 700.

These are the integers as follows:

3*4*2=24

3*4*3=36

3*4*4=48

3*4*5=60

3*4*6=72 ...

So these is any integer from 1 to 2400 which can be divided by 12 but own 12.

The number of such integers is:

2400:12-1=200-1=199

So the number of black integers is 700-199=501

That means that the number of white integers is 2400-501 = 1899

The required probability is P=1899/2400=633/800

5 0

3 years ago