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3 years ago

Write 5,370 expanded form

Mathematics

1 answer:

tatyana61 [14]3 years ago

4 0

The expanded form of writing 5,370 is 5,000+300+70

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Simplify (3/5x-5)(3/5x+5)

Whitepunk [10]

Answer:

9/25x^2 -25

Step-by-step explanation:

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3 years ago

Which equation has a constant of proportionality equal to 9 y=81/3x y=9x y=3x y==1/9x

aev [14]

Answer:

B) y = 9 x has Proportionality Constant = 9

Step-by-step explanation:

Two quantities P and Q are said to be PROPORTIONAL if and only if:

P ∝ Q ⇔ P = k Q ⇔ $k = \frac{P}{Q}$

Here, k = PROPORTIONALITY CONSTANT

Given : k = 9

Now, let us consider the given expressions in which x ∝y

y = 81/3 x

Here, $\frac{y}{x} = \frac{81}{3} = 27 \ne 9$

So, here Proportionality Constant ≠ 9

y = 9 x

Here, $\frac{y}{x} = 9$

So, here Proportionality Constant = 9

y = 3 x

Here, $\frac{y}{x} = 3 \ne 9$

So, here Proportionality Constant ≠ 9

y = 1/9 x

Here, $\frac{y}{x} = \frac{1}{9} \ne 9$

So, here Proportionality Constant ≠ 9

Hence, only y = 9 x has Proportionality Constant = 9

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3 years ago

What is the area of the figure below?

Marat540 [252]

Answer:

Step-by-step explanation:

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3 years ago

a metalworker has meal alloy that is 15% copper and another alloy that is 60% copper. how many kilograms of each alloy should th

iragen [17]

Let L be the low copper alloy and H be the high copper alloy.
We need 0.15L + 0.60H = 0.42 and L + H = 100

L=100 - H
Substituting this into the second equation for L, we get:
0.15(100-H) + 0.60H = 0.42(H+L)
15 - 0.15H + 0.60H = 0.42(H+100-H)
15 + 0.45H = 0.42(100)
0.45H = 42 - 15 = 27
H = 27/.45 = 60 lbs

Back substitution, L = 40 lbs.

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3 years ago

Quick need help for this question

Tasya [4]

It’s c I did this in my class

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3 years ago