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2 years ago

15

Lucas and Tayvan can paint a house in 1 hour working together. If Tayvan works alone, he can paint the house in 1.5 hours. How l

ong would it take Lucas to complete the job on his own?

1 answer:

nikitadnepr [17]2 years ago

7 0

Answer:

1 hour

Step-by-step explanation:

no explanation its common sense lol

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What is the determinant of the coefficient matrix of the system {4x+3y+2z=0 -3x+y+5z=0 -x-4y+3z=0

slava [35]

Answer:

130

Step-by-step explanation:

You want the determinant of the matrix ...

$\left[\begin{array}{ccc}4&3&2\\-3&1&5\\-1&-4&3\end{array}\right]$

One way to figure it is as the difference between the sum of products of the down-diagonals and the sum of products of the up-diagonals:

D = (4)(1)(3) +(3)(5)(-1) +(2)(-3)(-4) -(-1)(1)(2) -(-4)(5)(4) -(3)(-3)(3)

= 12 -15 +24 +2 +80 +27

D = 130

The determinant of the coefficient matrix is 130.

_____

Many scientific and graphing calculators and web sites can perform this calculation for you.

7 0

3 years ago

A store is having a 20% off sale. If the

Aleks [24]

Answer:

$64.32

Step-by-step explanation:

What you do is:

$53.60×20% → $53.60×0.2

$53.60×0.2=$10.72

$10.72 is the amount of money taken off because of the sale.

Then what you do is:

$53.60+$10.72=_____

53.60

<u>+10.72</u>

64.32

The original price was $64.32.

Hope this helps! Please mark my answer brainliest!

3 0

3 years ago

Read 2 more answers

What is the value of y in the system of equations?<br> 5x + y = -1<br> y = 6x + 10

Vinil7 [7]

Answer:

y = 4

Step-by-step explanation:

5x + y = -1

y = -1 - 5x

y = 6x + 10

6x + 10 = -1 - 5x

11x = -11

x = -1

y = 6x + 10 = 6(-1) + 10 = -6 + 10 = 4

8 0

3 years ago

If the parallelogram floor needs a base of 16 feet,what will the height of the floor be

nydimaria [60]

Answer:

See Explanation

Step-by-step explanation:

<em>The question is incomplete because the area of the parallelogram is missing. However, the following will guide you in answering the question</em>

Given

$Base = 16\ ft$

Required

Determine the Height

Area of a Parallelogram is:

$Area = Base * Height$

Make Height the subject

$Height = \frac{Area}{Base}$

Substitute 16 for Base

$Height = \frac{Area}{16}$

This implies that you divide the value of area by 16 to get the height of the parallelogram.

Take for instance;

$Area = 64ft\²$

The height would be

$Height = \frac{64}{16}$

$Height = 4\ ft$

Or

$Area = 80ft\²$

The height would be

$Height = \frac{80}{16}$

$Height = 5\ ft$

7 0

3 years ago

A graph of a system of two equations is shown. PLEASE HELPP!!!!!

ale4655 [162]

Answer:

From the graph

$x=1$

$y=0$

--------------

hope it helps...

have a great day

4 0

2 years ago