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3 years ago

What is the total cost for an item that costs 26.50 and has a sales tax rate of 6%

Mathematics

1 answer:

Zarrin [17]3 years ago

3 0

$27.83 I'm pretty sure.

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To mix plaster for a dental model, 45 milliliters (mL) of water are used for 100 grams (g) of plaster. How many milliliters (mL)

Tomtit [17]

$\begin{array}{ccc}45\ ml&-&100\ g\\\\x\ ml&-&250\ g\end{array}\ \ \ |cross\ multiply\\\\\\100\cdot x=45\cdot250\\\\100x=11,250\ \ \ |divide\ both\ sides\ by\ 100\\\\\huge\boxed{x=1,125\ (ml)}$

6 0

3 years ago

Let f(x) = (5)^x+1 .Evaluate f (-3) without using a calculator

rewona [7]

Answer:

$f\left(-3\right)=\frac{126}{125}$

Step-by-step explanation:

Given

$f\left(x\right)\:=\:\left(5\right)^x+1$

Putting x = -3 to find f(-3)

$f\left(-3\right)\:=\:\left(5\right)^{\left(-3\right)}+1$

$5^{-3}=\frac{1}{125}$ ∵ $\mathrm{Apply\:exponent\:rule}:\quad \:a^{-b}=\frac{1}{a^b}$

$f\left(-3\right)=\frac{1}{125}+1$

$\mathrm{Convert\:element\:to\:fraction}:\quad \:1=\frac{1\cdot \:125}{125}$

$f\left(-3\right)=\frac{1\cdot \:\:125}{125}+\frac{1}{125}$

$\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}$

$f\left(-3\right)=\frac{1\cdot \:\:125+1}{125}$

$f\left(-3\right)=\frac{126}{125}$ ∵ $1\cdot \:125+1=126$

Thus,

$f\left(-3\right)=\frac{126}{125}$

6 0

4 years ago

2. Given that set M = {Even numbers between 20 and 35), find n(m)

Advocard [28]

Step-by-step explanation:

Set M = {20,22,24,26,28,30,32,34}

n(M) = no. of elements in set M

i.e.

n(M) = 8

8 0

3 years ago

Read 2 more answers

Please help me with this question

WITCHER [35]

Answer:

you can't cheat in an online school math test =_=

Step-by-step explanation:

4 0

3 years ago

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Turn upside down but somebody HELP!

bogdanovich [222]

Part of the answer is covered up.

Get a better picture please

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3 years ago