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UkoKoshka [18]
3 years ago
11

Choose the correct transitional expression in the sentence below.

Mathematics
1 answer:
stellarik [79]3 years ago
4 0
It is meanwhile because it makes sense

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Find the value of the expression when x = 2, y = - 4 and z = ½.
Alla [95]

what is the expression

I guess the question is incomplete

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3 years ago
Mia wants to deposit $3,886 into savings accounts at three different banks: Bank of the US, 7/4 Bank, and Catch Bank. She will d
Phantasy [73]
A = deposit at US bank

b = deposit at 7/4 bank

c = deposit at Catch bank.

we know her total is 3886, thus  a + b + c = 3886.

now, we know whatever "b" is, the amount at US bank, "a", is 3 times that much, thus a = 3b.

(3b) + b + c = 3886.

whatever% of anything, is just (whatever/100) * anything.

we know Catch bank gets 45% of whatever the sum of the other two is, well, US bank gets "3b", 7/4 bank gets "b", their total is 3b + b = 4b, and Catch bank gets 45% of that, (45/100) * 4b

\bf \stackrel{US~bank}{3b}~+~\stackrel{7/4~bank}{b}~+~\stackrel{Catch~bank}{\frac{45}{100}(4b)}~=~3886
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4b+\cfrac{9}{5}b=3886\impliedby \textit{let's multiply both sides by }\stackrel{LCD}{5}
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20b+9b=19430\implies 29b=19430\implies b=\cfrac{19430}{29}\implies b=670

how much is it for the Catch bank?  well, (45/100) * 4(670).
6 0
3 years ago
Brainliest to whoever gets it right first
Inga [223]
I just guessed and it is 108
3 0
3 years ago
The decibel level of sound is 50 dB greater on a busy street than in a quiet room where the intensity of sound is watt/m2. The l
makkiz [27]

Complete question is;

The decibel level of sound is 50 dB greater on a busy street than in a quiet room where the intensity of sound is 10^-10 watt/m2. The level of sound in the quiet room is (10,20,100) dB, and the intensity of sound in the busy street is (10^-1, 10^-5, 10^-10) watt/m2.

Use the formula , β = 10log I/I 0 where β is the sound level in decibels, I is the intensity of sound you are measuring, and Io is the smallest sound intensity that can be heard by the human ear (roughly equal to 1 x 10^-12 watts/m2).

Answer:

A) The level of sound in the quiet room will be 20 dB

B) The intensity of sound in the busy street is 10⁻⁵ W·m⁻²

Step-by-step explanation:

Formula given is; β = 10log(I/I₀)

(a) For Quiet room:

We are given;

I = 10⁻¹⁰ W·m⁻²

I₀ = 1 × 10⁻¹² W·m⁻²

Plugging these values into the given equation, we have;

β = 10log[(10⁻¹⁰/(1 × 10⁻¹²)]

β = 10log(10²)

β = 10 × 2 = 20 dB

Thus, the level of sound in the quiet room will be 20 dB.

(b) For the Street;

We are given;

β(street) - β(room) = 50 dB

Now, let's rewrite the given intensity level equation;

β = 10logI - 10 logI₀

Now, Let the intensity level for the room be β₁ and let the intensity level for the road be β₂. Thus;

β₁ = 10logI₁ - 10log I₀ - - - - (eq 1)

β₂ = 10logI₂ - 10logI₀ - - - - (eq 2)

Subtract eq 1 from eq 2 to give;

β₂ - β₁ = 10logI₂ - 10logI₁

50 = 10logI₂ - 10log(10⁻¹⁰)

Divide each term by 10 to give:

5 = logI₂ - log(10⁻¹⁰)

5 = logI₂ - (-10)

5 = logI₂ + 10

Subtract 10 from each side to give;

-5 = logI₂

Taking the antilog of both sides to give;

I₂ = 10⁻⁵ W·m⁻²

Thus, the intensity of sound in the busy street is 10⁻⁵ W·m⁻².

7 0
4 years ago
PLEASE HELP FAST!!!!!
Airida [17]

Answer:

A: the starting height?

B: a plant with a starting height of 1.75 grows to a height 20% taller than its previous height?

Step-by-step explanation:

8 0
3 years ago
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