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KonstantinChe [14]

2 years ago

9

If a: b= 3:4 then find the value of(6a-3b :(5a + 2b)

1 answer:

KengaRu [80]2 years ago

7 0

Answer:

6 : 23

Step-by-step explanation:

$a : b = 3 : 4 ....(given)\\ \\ let \: a = 3x \\ b = 4x \\ \\ (6a - 3b) : (5a + 2b) \\ \\ = \frac{(6a - 3b)}{(5a + 2b)} \\ \\ = \frac{6(3x) - 3(4x)}{5(3x) + 2(4x)} \\ \\ = \frac{18x- 12x}{15x+ 8x} \\ \\ = \frac{6x}{23x} \\ \\ = \frac{6}{23} \\ \\ (6a - 3b) : (5a + 2b) = 6 : 23$

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Why do super heroes where their under wear outside

madam [21]

Because they find it to look stylish.

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3 years ago

At a bake sale, as student spent $11.00 buying 3 brownies and 5 cookies. His friend spent $3.95 buying 1 brownie and 2 cookies.

riadik2000 [5.3K]

Answer:

$ $$2.25$

Step-by-step explanation:

Let $b =$ the cost of one brownie, $c =$ cost of one cookie

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Times $3$ on both sides on the second equation above to get the following:

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Hope this helps :)

4 0

3 years ago

In mrs.smiths class every time you turn in 10 assignments you earn 1 homework pass.Write 3 equivalent ratios if turned in assign

frutty [35]

Answer:

Step-by-step explanation:

For every 10 assignments you get 1 homework pass. So you would multiply them by two and up more.

So here's some of your answers:

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8 0

2 years ago

LMNP is a parallelogram.

Amanda [17]

A rectangle is a parallelogram with four right angles.

That's why in order to prove that LMNP is rectangle you have to show that LP is perpendicular to PN.

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$\overrightarrow{PL}=(-4-(-3),1-(-1))=(-1,2),\\ \overrightarrow{PN}=(3-(-3),2-(-1))=(6,3)$ .

Find the dot product:

$\overrightarrow{PL}\cdot \overrightarrow{PN}=-1\cdot 6+2\cdot 3=-6+6=0$ .

Since the dot product of two vectors is equal to zero, these vectors are perpendicular.

LMNP is a parallelogarm, then

$m\angle P=m\angle M=90^{\circ},\\ m\angle L=m\angle N=180^{\circ}-90^{\circ}=90^{\circ}$ .

You show that all angles are right, this means that parallelogram LMNP is a rectangle.

Answer: correct choice is D.

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3 years ago

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deff fn [24]

Answer:

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3 years ago

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