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3 years ago

I need help with my math homework so If f(n)=5n+8 F(4)=?

Mathematics

1 answer:

kati45 [8]3 years ago

3 0

Answer:28

Step-by-step explanation: in this case n=4, so you would plug in 4 into the equation: 5(4)+8 which equals 8

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Jack wanted to measure the weight of his luggage at the airport before departure. He was surprised to see that it weighed 23.6 k

Alex

Answer:

25.7 is how much his luggage weighs.

Step-by-step explanation:

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3 years ago

Which of the following fractions compares BC to BD? 2/3 5/2 2/5 3/2

-BARSIC- [3]

Answer:

2/3

Step-by-step explanation:

BC = 2 tiles

BD = 3 tiles

BC (2) : BD (3)

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3 years ago

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2. The alkalinity of a fluid (pH) can be modeled in terms of its hydrogen ion concentration (H+, measured in moles/liter) of the

nataly862011 [7]

Given the equation:

$pH=-log\mleft(H^+\mright)$

You know that a lab technician finds that a sample of fluid has this pH:

$pH=4.5$

Then, in order to find the hydrogen ion concentration of the fluid, you need to follow these steps:

1. Substitute the pH given in the exercise into the equation:

$4.5=-log(H^+)$

Multiply both sides by -1:

$-4.5=\log (H^+)$

2. Solve for:

$H^+$

Remember that, by definition:

$\log _b\mleft(c\mright)=a\Rightarrow b^a=c$

In this case, you can identify that:

$\begin{gathered} a=-4.5 \\ b=10 \\ c=H^+ \end{gathered}$

Hence, substituting values and simplifying, you get:

$\begin{gathered} b^a=c \\ 10^{-4.5}=H^+ \\ H^+=0.00003162278\text{ }\frac{moles}{liter} \end{gathered}$

Therefore, the answer is:

$H^+=0.00003162278\text{ }\frac{moles}{liter}$

4 0

2 years ago

<img src="https://tex.z-dn.net/?f=461%20%5Cdiv%201.1." id="TexFormula1" title="461 \div 1.1." alt="461 \div 1.1." align="absmidd

Zina [86]

Answer:

$\large\boxed{19\dfrac{17}{20}}$

Step-by-step explanation:

$\text{First step:}\\\\\text{Find LCD}\ (Least\ Common\ Denominator)\\\\LCD=20\\\\4\cdot5=20\\5\cdot4=20\\\\\dfrac{1}{4}=\dfrac{1\cdot5}{4\cdot5}=\dfrac{5}{20}\\\\\dfrac{3}{5}=\dfrac{3\cdot4}{5\cdot4}=\dfrac{12}{20}\\\\9\dfrac{1}{4}+10\dfrac{3}{5}=9\dfrac{5}{20}+10\dfrac{12}{20}=(9+10)+\dfrac{5+12}{20}=19\dfrac{17}{20}$

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3 years ago

How would the school work differently if any of the locations above were missing

ale4655 [162]

Answer:

huh what locations

Step-by-step explanation:

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3 years ago

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