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4 years ago

What is 66 tens-30 tens

Mathematics

2 answers:

ValentinkaMS [17]4 years ago

7 0

66-30 is 36
so 36tens or 360

Nikitich [7]4 years ago

3 0

36 tens or 360 is the answer.

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Help, i know the answer but i don’t know how to do the work

Diano4ka-milaya [45]

Answer:

Step-by-step explanation:

Using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$

Simplifying each radical before combining them.

$\sqrt{45t}$

= $\sqrt{9(5t)}$

= $\sqrt{9}$ × $\sqrt{5t}$ = 3 $\sqrt{5t}$

-----------------------------------------------------------------------------

$\sqrt{125t}$

= $\sqrt{25(5t)}$

= $\sqrt{25}$ × $\sqrt{5t}$ = 5 $\sqrt{5t}$

---------------------------------------------------------------------------

Hence

2(3 $\sqrt{5t}$ ) - 3(5 $\sqrt{5t}$

= 6 $\sqrt{5t}$ - 15 $\sqrt{5t}$

= - 9 $\sqrt{5t}$ → C

7 0

4 years ago

You are buying 12-packs of Mountain Dew for $\text{4.50}4.50 each and have a gift card worth $77. The function m\left(x\right)=4

poizon [28]

Answer:

$191

Step-by-step explanation:

The function is given by :

m(x) = 4.50x-7 ...(1)

Where

m(x) is the total cost if you buy x 12 packs of Mountain Dew.

We need to find the cost you pay to buy 44 12-packs of Mountain Dew

Put x = 44 in equation (1), we get :

m(x) = 4.50(44)-7

m(x) = 198-7

m(x) = $191

Hene, the cost for 44 12- packs of Mountain Dew is $191.

7 0

3 years ago

The radius of a cylindrical construction pipe is 1.5ft. If the pipe is 18ft long, what is its volume? Use the value 3.14 for π ,

olya-2409 [2.1K]

$\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h\quad 
\begin{cases}
r=radius\\
h=height\\
-----\\
r=1.5\\
h=18
\end{cases}\implies V=\pi \cdot 1.5^2\cdot 18$

3 0

4 years ago

Solve the inequality.Explain all steps and Identify the properties used. n/-3 + 5>4

Virty [35]

N/-3>4-5
then you can just times by -3 to get n on it's own
n>-3(4-5)
n>-3*-1
n>3

4 0

4 years ago

Read 2 more answers

Prove the identity with rules<br> (1-cos(-x)) / (sec(-x)-1) =cosx

Aloiza [94]

By using the rules:

$cos(-x) = cos(x)\\\\sec(x) = \frac{1}{cos(x)}$

We have proven the identity. Below you can follow the demonstration.

<h3></h3><h3>How to prove the identity?</h3>

Here you need to remember two things:

$cos(-x) = cos(x)\\\\sec(x) = \frac{1}{cos(x)}$

Here we have the expression:

$\frac{1 - cos(-x)}{sec(-x) - 1}$

By using the first rule, we can rewrite:

$\frac{1 - cos(-x)}{sec(-x) - 1} = \frac{1 - cos(x)}{sec(x) - 1}$

By using the second rule, we can rewrite:

$\frac{1 - cos(x)}{sec(x) - 1} = \frac{1 - cos(x)}{\frac{1}{cos(x)} - 1}$

Now if we multiply and divide by cos(x), we get:

$\frac{1 - cos(x)}{\frac{1}{cos(x)} - 1} = \frac{1 - cos(x)}{\frac{1}{cos(x)} - 1} *\frac{cos(x)}{cos(x) } = \frac{(1- cos(x))*cos(x)}{1 - cos(x)} = cos(x)$

In this way, the identity was proven.

If you want to learn more about trigonometric identities:

brainly.com/question/7331447

#SPJ1

8 0

2 years ago