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Vera_Pavlovna [14]
3 years ago
15

Please Help...Anyone? I am revising for a test tomorrow, so please explain how you get the answer, too.. The ratios of the ages

of Sunil and his Wife is 4:3. After 4 years, the ratio will be 9:7. What is the present age of Sunil

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
8 0

Answer:

32 years old

Step-by-step explanation:

Please see attached picture for full solution.

Let Sunil's present age be 4x and his wife's present age be 3x.

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Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the corre
Natasha_Volkova [10]

xy - -4x²

Step-by-step explanation:

(2x - 3y)(4x -y)

2x( 4x -y) -3x( 4x - y)

8x² - 2xy - 12x² + 3xy

8x²- 12x²- 2xy + 3xy

-4x² + xy

xy - -4x²

6 0
3 years ago
Which could be the function?
sladkih [1.3K]

Answer:

f(x)=(x-4)^{2}

Step-by-step explanation:

we have that

The axis of symmetry shown in the graph is x=4

we know that

The axis of symmetry of a vertical parabola is equal to the x-coordinate of the vertex

so

<em>Verify each case</em>

<em>case a)</em> we have

f(x)=(x+4)^{2}

The vertex is the point (-4,0)

therefore

Cannot be the function

<em>case b)</em> we have

f(x)=x^{2}+4

The vertex is the point (0,4)

The axis of symmetry is x=0

therefore

Cannot be the function

<em>case c)</em> we have

f(x)=(x-4)^{2}

The vertex is the point (4,0)

The axis of symmetry is x=4

therefore

Could be the function

<em>case d)</em> we have

f(x)=x^{2}-4

The vertex is the point (0,-4)

The axis of symmetry is x=0

therefore

Cannot be the function

8 0
3 years ago
Read 2 more answers
Write the slope-intercept form of the equation of the line.
maxonik [38]

Answer:

y=-1x+2

Step-by-step explanation:

I think this is the answer because 2 is the y intercept and the x is -2 but negative would not be the slope.

5 0
2 years ago
Solve sec2theta + tantheta - 3 =0 for 0
Serhud [2]

Answer:

Ф = \frac{\pi }{4} ,\frac{5\pi}{4}

Step-by-step explanation:

It is a bit difficult to input the work here, so I uploaded an image

  • First we can use the trig identities to change sec²(Ф) to tan²(Ф) + 1
  • Then we can combine like terms
  • Then we can factor this as a polynomial function
  • Then we can set each term equal to zero and solve for Ф
  • The first term tan(Ф) - 2 = 0 has no solution because tan(Ф) ≠ -2 anywhere
  • The second term tan(Ф) - 1 = 0 has two solutions of \frac{\pi}{4} and \frac{5\pi}{4} so these are the solutions to the problem

7 0
3 years ago
2. Which expression is equivalent to 20+64
MaRussiya [10]

Answer:

20+64=84

40+44=84

74+10=84

30+54=84

Step-by-step explanation:

(pls mark brainliest if u can)

:D

4 0
3 years ago
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