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Virty [35]
4 years ago
11

A Student has 1000 and buys a pen costing x naira and a book costing y naira. How much does the student have left

Mathematics
1 answer:
Sveta_85 [38]4 years ago
3 0

Answer:

1000 -x -y

Step-by-step explanation:

thats the equation that you can use as the answer, i bealive there must be like a part b, where you are now supposed to input the values

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Suppose that 5 J of work is needed to stretch a spring from its natural length of 30 cm to a length of 39 cm.
vesna_86 [32]

Answer

given,

work = 5 J

spring stretch form 30 cm to 39 cm

W = \dfrac{1}{2}kx^2

x = 0.39 - 0.30 = 0.09 m

5 = \dfrac{1}{2}k\times 0.09^2

k = \dfrac{5\times 2}{0.09^2}

k = 1234.568 N/m

a) work when spring is stretched from  32 cm to 34 cm

x₂= 0.34 -0.30 = 0.04 m

x₁ = 0.32 - 0.30 = 0.02

W = \dfrac{1}{2}k(x_2^2-x_1^2)^2

W = \dfrac{1}{2}\times 1234.568 \times (0.04^2-0.02^2)^2

W = 0.741 J

b) F = k x

  25 = 1234.568 × x

     x = 0.0205 m

     x = 2.05 cm

3 0
3 years ago
A line cook is paid at the end of each workday. His daily earnings include $74 plus X percent of the Restaurants total tip at th
Katen [24]
Hi idk but I’ll ask
6 0
3 years ago
Please give me the right answer
ivann1987 [24]

Answer:j

Step-by-step explanation:

If it’s closed it would be greater than -2 but since it’s open it’s equal or greater than

8 0
4 years ago
Can someone please help me on e and f i dont understand it and pls explain
Lemur [1.5K]
For parts A, B, C, and D you most likely created a line. What question E is asking is for you to create a line that is perpendicular to the line you already created that also passes through the point (1,1). What is important to understand here is that the slope of the perpendicular line is the negative reciprocal of the original line's slope... if the original slope is (-4/3) than the perpendicular slope is (3/4)... then you should just plug that new slope into point-slope form or slope-intercept form to get your equation... y-y1 = m(x-x1) ... y-1= (3/4)(x-1) ... so it would be y=(3/4)x + 1/4 then for part f just convert into standard form which is just manipulating the variables... look up standard form equation on Google and manipulate the variables from there.
4 0
3 years ago
Elena and Lin are trying to solve 12x+3=72x+5. Describe the change they each make to each side of the equation.
algol13

Answer:

No Solution

Step-by-step explanation:

12x + 3 = 72x + 5

subtract 12x from both sides

end up with

3 = 72x - 12x + 5

subtract 12x to 72x

3 = 60x + 5

-5 from both sides

-8 = 60x

since x is a bigger number the answer would be NO SOLUTION

12x + 3 = 72x + 5

I do not understand lins logic

x + 6 = 7x + 10

subtract 6 from both sides

x = 7x + 4

move 7x to the other side

7x = 4

divide 7

x = 0.5

Also wrong because I get how lin got that answer

My way

12x + 3 = 72x + 5

-12 x from both sides

3 = 60x + 5

+5 to other side

8 = 60x

if the x was on the other side it would make sense

but it is not so the Answer is NO SOLUTION

Hope this Helped :)

5 0
3 years ago
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