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2 years ago

Can someone please help me?

Mathematics

2 answers:

Ierofanga [76]2 years ago

5 0

Hello!

<h2>Answer:</h2>

The correct answer is option four, 27.

<h2>Explanation:</h2>

We know that a = 9.

Because the a is right next to the 7 and the 4, this indicates that it is being multiplied.

7a - 4a

Substitute for the 'a'.

= 7(9) - 4(9)

= 63 - 36

= 27

VikaD [51]2 years ago

4 0

Answer:

The answer is 27

Step-by-step explanation:

The reason being, you can solve this 2 ways.

1) Combine like terms, 7a-4a = 3a.

Now just substitute (a=9) into 3a.

3 * (9) = 27.

2) Or just substitute a = 9 into the original expression.

7 * (9) - 4 * (9)

= 63 - 36 = 27

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Mademuasel [1]

Answer:

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Step-by-step explanaition:

The domain (x) can not repeat in order for it to be a function.

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2 years ago

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givi [52]

Answer:

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Step-by-step explanation:

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2 years ago

1 dollar = 1.2 euros

MArishka [77]

85 yen are equivalent to 1 euro ⇒ answer O

Step-by-step explanation:

The given is:

1 dollar = 1.2 euros
1 dollar = 102 yen

We need to find how many yens are equivalent to 1 euro

∵ 1 dollar = 1.2 euros

∵ 1 dollar = 102 yen

- Equate the two right sides of 1 dollar

∴ 1.2 euros = 102 yen

- To find 1 euro equals how many yen divide both sides by 1.2

∵ (1.2 ÷ 1.2) euros = (102 ÷ 1.2) yen

∴ 1 euro = 85 yen

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You can learn more about the word problems in brainly.com/question/2119883

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4 0

2 years ago

Q3: Identify the graph of the equation and write and equation of the translated or rotated graph in general form. (Picture Provi

natta225 [31]

Answer:

b. circle; $2(x')^2+2(y')^2-5x'-5\sqrt{3}y'-6 =0$

Step-by-step explanation:

The given conic has equation;

$x^2-5x+y^2=3$

We complete the square to obtain;

$(x-\frac{5}{2})^2+(y-0)^2=\frac{37}{4}$

This is a circle with center;

$(\frac{5}{2},0)$

This implies that;

$x=\frac{5}{2},y=0$

When the circle is rotated through an angle of $\theta=\frac{\pi}{3}$ ,

The new center is obtained using;

$x'=x\cos(\theta)+y\sin(\theta)$ and $y'=-x\sin(\theta)+y\cos(\theta)$

We plug in the given angle with x and y values to get;

$x'=(\frac{5}{2})\cos(\frac{\pi}{3})+(0)\sin(\frac{\pi}{3})$ and $y'=--(\frac{5}{2})\sin(\frac{\pi}{3})+(0)\cos(\frac{\pi}{3})$

This gives us;

$x'=\frac{5}{4} ,y'=\frac{5\sqrt{3} }{4}$

The equation of the rotated circle is;

$(x'-\frac{5}{4})^2+(y'-\frac{5\sqrt{3} }{4})^2=\frac{37}{4}$

Expand;

$(x')^2+(y')^2-\frac{5\sqrt{3} }{2}y'-\frac{5}{2}x'+\frac{25}{4} =\frac{37}{4}$

Multiply through by 4; to get

$4(x')^2+4(y')^2-10\sqrt{3}y'-10x'+25 =37$

Write in general form;

$4(x')^2+4(y')^2-10x'-10\sqrt{3}y'-12 =0$

Divide through by 2.

$2(x')^2+2(y')^2-5x'-5\sqrt{3}y'-6 =0$

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3 years ago

Mario is missing half of his assignments. If a represents the number of assignments, write an expression to show how many assign

tekilochka [14]

You can't answer this you have no actual information. You don't know how many assignments there are.

a/2 would be the only possible answer

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2 years ago