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3 years ago

43 ones x 3 tens= Tens

Mathematics

2 answers:

spayn [35]3 years ago

6 0

The answer is 1290
43 ones x 3 tens = 43 x 30

Zepler [3.9K]3 years ago

5 0

43 ones x 3tens would give you 129 tens. 43x30=1290 so you then divide 1290 by 10 which gives you 129 tens

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What is the radius of a circle with an area of 78.5 cubic inches? Use 3.14 for pi. Enter your answer in the box.

UkoKoshka [18]

$\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ A=78.5 \end{cases}\implies 78.5=\pi r^2\implies \cfrac{78.5}{\pi }=r^2 \\\\\\ \sqrt{\cfrac{78.5}{\pi }}=r\implies 4.9987\approx r$

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3 years ago

Read 2 more answers

PLS HELPP , i tried solving this and i wrote 56 but it was wrong so i don’t know anymore pls pls help

Vedmedyk [2.9K]

Answer:

y = 68

A = 44

Step-by-step explanation:

No matter what may be true, that doesn't look like an a to me.

x = y = 68 x and y are opposite equal sides and are therefore =.

68 + 68 + A = 180 all triangles are 180 degrees.

136 + A = 180 Subtract 136 from both sides

A = 180 - 136

A = 44

7 0

3 years ago

QUESTION 6 What is the mean of the following set of data? Round your answer to two decimal places. 78, 82, 91, 100, 78, 92, 82,

guajiro [1.7K]

Mean is the average number. To find mean, add all the numbers and divide by how many numbers there are.

$78 + 82 + 91 + 100 + 78 + 92 + 82 + 77 + 80 = 760$

There are 9 numbers. Divide by 9

$760 \div 9 = 84.44$

Question 6 ⇒ C. 84.44

Median is the middle number when ordered from least to greatest. First order the numbers.

$4, 5, 6, 9, 10, 11, 12, 13, 15, 16$

The 2 middle numbers are 10 and 11. Add them together and divide by 2

$10 + 11 = 21 \\ 21 \div 2 = 10.5$

Question 7 ⇒ D. 10.5

8 0

3 years ago

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Determine the equation of the line that is perpendicular to the lines r(t) equalsleft angle6t,1 plus3 t,4tright angle and R(

Lynna [10]

$\vec r(t)=\langle6t,1+3t,4t\rangle$

$\vec R(s)=\langle2+s,-8+3s,-12+4s\rangle$

Take the derivatives of each to get the tangent vectors:

$\dfrac{\mathrm d\vec r(t)}{\mathrm dt}=\langle6,3,4\rangle$

$\dfrac{\mathrm d\vec R(s)}{\mathrm ds}=\langle1,3,4\rangle$

Take the cross product of the tangent vectors to get a vector that is normal to both lines:

$\langle6,3,4\rangle\times\langle1,3,4\rangle=\langle0,-20,15\rangle$

The two given lines intersect when $\vec r(t)=\vec R(s)$ :

$\langle6t,1+3t,4t\rangle=\langle2+s,-8+3s,-12+4s\rangle\implies t=1,s=4$

that is, at the point (6, 4, 4).

The line perpendicular to both of the given lines through the origin is obtained by scaling the normal vector found earlier by $\tau\in\Bbb R$ ; translate this line by adding the vector $\langle6,4,4\rangle$ to get the line we want,

$\vec\rho(\tau)=\langle6,4,4\rangle+\langle0,-20,15\rangle\tau$

$\boxed{\vec\rho(\tau)=\langle6,4-20\tau,4+15\tau\rangle}$

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2 years ago

I NEED HELP WILL GIVE CROWN FOR RIGHT ANSWER

aev [14]

There are 2.5 grams of niacin contained in the bottle.

First you have to find how many milligrams are in the bottle.

So you multiply 125 by 20 since there are 125 tablets and 20 milligrams in each one.

125*20=2500

So there are 2500 milligrams in the bottle. Then you have to convert it into grams. To do that you divide the mass by 1000.

2500/1000=2.5

So there are 2.5 grams in the bottle.

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3 years ago