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3 years ago

Can u help me with this one

Mathematics

2 answers:

valina [46]3 years ago

5 0

Answer:

Step-by-step explanation:

4x+6=7x

Subtract 4x from both sides.

6=3x or 3x=6

Therefore x=2.

The length of PR is 7x, or 7(2), which is 14.

Brilliant_brown [7]3 years ago

4 0

Answer:

10x ?

Step-by-step explanation:

i guessed .

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Solve 2x^2<br> + x - 4= 0.<br> x2 +<br> = 0<br> DONE

inessss [21]

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$\\ \sf\longmapsto 2x^2+x=4$

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$\\ \sf\longmapsto (4x)^2+2(4x)(1)=32$

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3 years ago

Kaya used 7 cups of flour to bake 5 cakes how much flour on average did she put in each cake ? Write your answer as a decimal.

Ksju [112]

The answer would be 1.4, because 7 cups into 5 cakes equals 1.4.

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3 0

4 years ago

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What is the length of each side of a square that has the same area as a rectangle that is 5.4 mm long and 2.6 mm wide? Round to

Vlad1618 [11]

Hey!

Area is equal to length × width. First find the area of the rectangle.

$5.4 \times 2.6 = 14.04$

The area of the rectangle is 14.04 mm². That means the area of the square is also 14.04 mm². In a square, all 4 sides are the same. The length and width are the same.

Try all choices and see which is the closest

$3.75 \times 3.75 = 14.06$

$3.87 \times 3.87 = 14.98$

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4 years ago

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If 100% of a number is 15, what is 50% of the number?

anzhelika [568]

Answer:

Let n be the number

100% of a number is 15 is written as: 100% × n = 15

100% = 100 / 100 = 1

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100% × n = n = 15

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Step-by-step explanation:

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4 years ago

If f(x) = 7 + 4x and g (x) = StartFraction 1 Over 2 x EndFraction, what is the value of (StartFraction f Over g EndFraction) (5)

Degger [83]

Answer:

$\frac{f}{g}(5)$ = 270 ⇒ Last answer

Step-by-step explanation:

* If f(x) = 7 + 4x

* If g(x) = $\frac{1}{2x}$

* We want to find $\frac{f}{g}(5)$

- Lets find at first $\frac{f}{g}(x)$

∵ f(x) = 7 + 4x

∵ g(x) = $\frac{1}{2x}$

∴ $\frac{f}{g}(x)=\frac{7+4x}{\frac{1}{2x}}$

- Lets divide the numerator by the denominator

∵ The numerator is 7 + 4x

∵ The denominator is $\frac{1}{2x}$

∴ (7 + 4x) ÷ $\frac{1}{2x}$

- Lets reverse the division sign to multiplication sign and reciprocal

the fraction after the division sign

∴ (7 + 4x) × $\frac{2x}{1}$

∴ $\frac{f}{g}(x)$ = 2x(7 + 4x)

∴ $\frac{f}{g}(x)$ = 14x + 8x²

- Now substitute x by 5

∴ $\frac{f}{g}(5)$ = 14(5) + 8(5)² = 70 + 200 = 270

∴ $\frac{f}{g}(5)$ = 270

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3 years ago

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