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3 years ago

15+8x=5y answer please

Mathematics

2 answers:

givi [52]3 years ago

4 0

No solution because the x and y together can't be true

alexira [117]3 years ago

3 0

15+8x+5y
8x+5y-15
x+5/8y-15/8

There is no solution

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Choose two positive integers a and b, making sure that a<5 and b>80 . The width of a rectangular computer screen is a inch

qwelly [4]

Answer:

Dimensions of the screen are a minimum of 10 inches wide by 8 inches high. The difference between the height and width will be 2 inches

Step-by-step explanation:

$Height = H$

$Width = H + a$

$Area = Height x Width$

$b = H * (H + a)$

$b = H^{2} + aH$

$H^{2} + aH > 80$

$H^{2} + aH - 80 > 0$

a<5 means 'a' can be a = 1, 2, 3, 4

Solving for H for each option of 'a' will give values of 'H' using the quadratic formula below

$H = \frac{-b\±\sqrt{b^{2}-4ac}}{2a}$

As 'a' and 'b' must be positive integers, H and W must be positive integers as well,

$a = 1, H = 8.46, H = -9.46$

$a = 2, H = 8, H = -10$

$a = 3, H = 7.57, H = -10.57$

$a = 4, H = 7.17, H = -11.17$

Based on above possible answers:

$a=2, H=8$

$W = H + a$

$W = 8 + 2$

$W = 10$

Dimensions of the screen are a minimum of 10 inches wide by 8 inches high. The difference between the height and width will be 2 inches

5 0

3 years ago

Lydia spent 4/5 of her money on a mobile phone and 2/3 of the remaining amount on a bag. She had $60 left. How much more money d

KengaRu [80]

The answer is 600 because 1 out 3 is 60 so to find the bag multiply by two while to find 1 out 5 of her monet take 60 times 3 which is 180. 180 times 4 is the money she spent on her mobile phone so take the money spent on her mobile phone(720)minus the amount of money spent on the bag(120)

5 0

3 years ago

Given triangle ABC with sides AB = 3x + 4 , BC = 2x + 5 , and AC = 4x , determine the values of x such that triangle ABC exists

Jlenok [28]

Answer:

x > 1/5

Step-by-step explanation:

All of these three triangle inequalities must be satisfied:

AB +BC > AC

BC +CA > BA

CA +AB > CB

___

Taking these one at a time, we have ...

AB +BC > AC

3x +4 + 2x +5 > 4x

x +9 > 0 . . . . . subtract 4x

x > -9

BC +CA > BA

2x +5 + 4x > 3x +4

3x > -1 . . . . . . subtract 3x+5

x > -1/3 . . . . . divide by 3

CA + AB > CB

4x + 3x +4 > 2x +5

5x > 1 . . . . . . subtract 2x+4

x > 1/5

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The only values of x that satisfy all of these inequalities are those such that ...

x > 1/5

8 0

3 years ago

Surveys indicate that two-thirds of all voters in Ward 5 plan on choosing Spike Jones for commissioner. If there are 500 voters

olya-2409 [2.1K]

Answer:

333 people of ward 5 are going to be voting for Spike Jones.

Solution:

We have been given that two-thirds of all voters in Ward 5 plan on choosing Spike Jones for commissioner.

There are 500 voters in Ward 5.

Since 2/3 of all voters in Ward 5 are voting for Spike Jones the remaining 1/3 will not be voting for him.

To find out how many people in ward 5 are exactly voting for Spike Jones. We need to calculate how much is two thirds of 500 is.

This is done as follows:

$\begin{array}{l}{\frac{2}{3} \times 500} \\\\ {=\frac{1000}{3}} \\\\ {=333.334}\end{array}$

Since people cannot be denoted in decimal points we have to round it off to a whole number. That’s is 333.

Therefore 333 people of ward 5 are going to be voting for Spike Jones.

4 0

3 years ago

Which property can be used to solve the equation? 5 d = 75

timama [110]

Answer:

Division

Step-by-step explanation:

To isolate d and solve the equation, divide 75 by 5.

4 0

3 years ago

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