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2 years ago

Hi can someone help me with these? if its wrong then just tell me so i can fix those ;-;

Mathematics

2 answers:

musickatia [10]2 years ago

8 0

Answer:

1) 1

2) 5

3) -8

4) 10

5) 9

6) -1

7) -3

Yuki888 [10]2 years ago

6 0

1) correct
2) correct
3) correct
4) correct
5) 9
6) -1
7) -3

hope this helps <3

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Write an equation of a line perpendicular to y=4x-3 that contains the point (0,7)

ExtremeBDS [4]

Let $k:y=m_1x+b_1$ and $l:y=m_2x+b_2$

$l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}$

We have

$y=4x-3\to m_1=4$

Therefore

$m_2=-\dfrac{1}{4}$

We have the equation of a line:

$y=-\dfrac{1}{4}x+b$

Put the coordinates of the point (0, 7) to the equation of a line:

$7=-\dfrac{1}{4}(0)+b\\\\\7=b\to b=7$

Answer: $\boxed{y=-\dfrac{1}{4}x+7}$

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3 years ago

Subtract these polynomials.<br> (3x2 – 2x+5) - (x + 3) =

Arada [10]

Answer:

$(6-2x+5)-(x+3)=(-2x+11)-x-3=-2x+11-x-3=-3x+11$

Step-by-step explanation:

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3 years ago

Jabari needs 575 tickets to get the prize he wants at the arcade .he already has 210 tickets and can earn 31 tickets each time h

EleoNora [17]

Answer:

Step-by-step explanation:

575 - 210 = 365

365/31 = 11.7741935484

if he plays 11 games, that's not enough. so he has to play 12 games

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3 years ago

Explain how the following are related: linear relationship, proportional relationship, equivalent ratios, and direct variation

Scilla [17]

With all of the following you are able to make a graph, table, and a equation.

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2 years ago

Five carpenters worked 15 & 3/4, 15 & 1/4, 17 & 1/2, 12 & 1/2 and 17 & 1/2 hours respectively. What was the

azamat

<u>The total </u><u>labor cost</u><u> of the carpenters is $2296.91</u>

The carpenters worked $15\frac{3}{4} , 15\frac{1}{4}, 17\frac{1}{2}, 12\frac{1}{2}, 17\frac{1}{2}$

<h3>Conversion of Fraction</h3>

Let's convert the mixed fraction to improper fraction

So, we would have

63/4,
61/4,
35/2,
25/2
35/2.

<h3>Working Cost</h3>

Let's sum it up and multiply by the working cost per hour

$63/4 + 61/4 + 35/2 + 25/2 + 35/2 =78.5$

The total labor cost is = total hours worked * hourly rate.

This becomes $78.5*29.26=2296.91$

<u>The total labor cost is $2296.91</u>

Learn more about rate here;

brainly.com/question/1115815

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2 years ago