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jonny [76]
3 years ago
13

Hi!! I need some help with those exercises can anybody help me please !! Thanks you

Mathematics
1 answer:
elena55 [62]3 years ago
6 0

Answer:

Step-by-step explanation:

(a+b)^2=a^(2)+2ab+b^(2)

(a-b)^2=a^(2)-2ab+b^(2)

13)

(x+2)^(2)-(x-1)^2

x^(2)+4x+4-(x^(2)-2x+1)

x^(2)+4x+4-x^(2)+2x-1

6x+3

15)

(x+5)^(2)-(x+1)^2

x^(2)+10x+25-(x^(2)+2x+1)

x^(2)+10x+25-x^(2)-2x-1

8x+24

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Learning task 2
evablogger [386]

Step-by-step explanation:

Row 1

  • k=2 ,  Equation: y=2xz

Row 2

  • x=10, k=2

Row 3

  • y= 192,  Equation: y= 4xz

Row 4

  • z= 2, k= 3

Row 5

  • x= 16/3, k= 3/4

<u>Note</u>. <em>The equation should be y = 3/4xz, not y = 3/4xy</em>

4 0
3 years ago
Which trigonometric function is being used if we get the fraction 6/10 as our answer? Question 3 options: sin(A) cos(A) tan(A) t
faust18 [17]

Answer:

cos A = 6/10

Step-by-step explanation:

That'd be cos A.  The cosine function is defined as the ratio

 adjacent side

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and here that ratio is cos A = 6/10.

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4 years ago
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MATHEMATICS IS HARD SO I NEED HELP
monitta

Answer:

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Step-by-step explanation:

3 0
3 years ago
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Which is the constant of variation, k, if y=kx, and y=10 when x=15?
Furkat [3]

Answer:

A. 2/3

Step-by-step explanation:

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7 0
2 years ago
yael used to have a square garage with 292ft^2 of floor space.she recently built an addition to it. The garage is still a​ squar
Arturiano [62]

Answer: 19

If the floor space of the garage is increased by 50%, that means its area is increased by that amount

So we have 228 + .50(228) = 228 + 114 = 342 ft²

Since the original garage is square-shaped with an area of 228 ft², then we can find the length of each side. If we let x = the side length, then we have:

x² = 228

x = 15.1 ft

Assuming that the garage will remain square-shaped with sides of uniform dimensions, then we can label each side of the expanded garage as 15 + y. We need to solve for y. Again, we use the area formula. Remember that the expanded garage will have an area of 342 ft², we now have:

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This can be solved using the Quadratic Formula. Remember that dimensions must always be positive. Once you determine y, then you will know what the length will be of the expanded garage

8 0
3 years ago
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