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vladimir1956 [14]
3 years ago
11

Help homework is due today. please

Mathematics
1 answer:
Oxana [17]3 years ago
8 0
First solve the equation:

5(3x-7)=20 => 15x - 35 = 20 => 15x = 55 => x=11/3

Fill in this solution in 6x-8:

6*11/3 - 8 = 22 - 8 = 14

Second question: apply the distributive property (ie,. both terms get multiplied by 4/5):

4/5(20x - 10) = 80/5x - 40/5 = 16x - 8
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The slope is -4 and the y-intercept is -12.
5 0
3 years ago
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If it took 2 hours to clean 4 houses how many houses could be cleaned in 3 hours​
leva [86]

Answer:

6

Step-by-step explanation:

it would be six in one hour he would clean 2 houses in two 4 houses then in three it would be six

8 0
3 years ago
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Solve equation (n-1)(n+6)(n+5)=0
Vika [28.1K]
Answer:
1, -6 and -5 

Explanation:
To solve the equation means to get the values of n which satisfy the given equation.
The equation given is:
(n-1) (n+6) (n+5) = 0
This equation will be true if any of the terms (brackets) is equal to zero.
This means that:
either n-1 = 0 .............> n = 1
or n + 6 = 0 ................> n = -6
or n + 5 = 0 ................> n = -5

Hope this helps :)
5 0
3 years ago
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Use two rectangles of equal width to estimate the area between the graph of f(x) = x + cos(πx) and the x-axis on the interval [2
MrRissso [65]
We find the base of the rectangles by taking the difference between the interval endpoints, and dividing by 2.
Base of rectangle = (6 - 2) / 2
= 2

The area of the first rectangle:

(4 - 2)f(4) = 2[4 + cos(4π)]


The area the second triangle:

(6 - 4)f(6) = 2[6 + cos(6π)]


Now just compute the two areas and combined them. That will give you the estimated under the curve.


To evaluate the midpoint of each rectangle, we take the midpoint of the base lengths of each rectangle. This midpoint is the x value. Then evaluate the function at that x value.


The midpoint of the first rectangle is x=3. Evaluate f(3).
The midpoint of the second rectangle is x=5. Evaluate f(5).
7 0
3 years ago
its Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is Rs 15/m2. (Take n=3.14) flona
Stells [14]

Step-by-step explanation:

Given diameter of table (circular) =1.6m

radius =0.8m

area of circle = πr

2

=3.14×0.64=2.0096m

2

Now rate of polishing per meter square =15Rs

Cost of polishing table top = 15×2.0096

cost = 30.14m

2

7 0
3 years ago
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