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4 years ago

What is 4000,000 rounded to the nearest ten point housads

Mathematics

1 answer:

wolverine [178]4 years ago

7 0

You have the comma in the wrong place.

It's 4,000,000 NOT 4000,000.

Round[4,000,000, 10]

Answer: 4 million

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will give brainslist!!!!! A local high school has 1250 students in grades 9 through 12. Twenty-eight percent of the students in

UNO [17]

Answer:

175 ride the bus

Step-by-step explanation:

28% of 1250 = 350

350 ÷ 2 = 175

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3 years ago

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Solve the proportion for t 15:75=30:t

Dominik [7]

The answer is 150.
15(2)=30 so
75(2) is 150

5 0

3 years ago

A car traveling at a certain speed will travel 76 feet per second. How many miles will the car travel in 3.1 hours if it maintai

liubo4ka [24]

Keeping in mind that, there are 5280 feet in 1 mile, and 60 minutes in an hour and 60 seconds in each minute, thus 60*60 seconds in an hour, or 3600 seconds.

$\bf \cfrac{76~\underline{feet}}{\underline{sec}}\cdot \cfrac{mile}{5280~\underline{feet}}\cdot \cfrac{3600~\underline{sec}}{hr}\implies \cfrac{76\cdot 3600~mile}{5280~hr}
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\cfrac{570~mile}{11~hr}\approx 51.\overline{81}\frac{mile}{hr}\\\\
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\textit{how many miles does it do in 3.1hrs?}\quad \cfrac{570}{11}\cdot 3.1$

6 0

3 years ago

Let Upper A equals left bracket Start 2 By 2 Matrix 1st Row 1st Column negative 2 2nd Column 4 2nd Row 1st Column 1 2nd Column 3

Yuliya22 [10]

Answer: a) AB = $\left[\begin{array}{ccc}-14&26\\-11&22\end{array}\right]$ ; b) $\left[\begin{array}{ccc}5&-5\\13&9\end{array}\right]$ ; c) No, they are different; d) No, they are never the same;

Step-by-step explanation:

a) A = $\left[\begin{array}{ccc}-2&4\\1&3\end{array}\right]$ , B = $\left[\begin{array}{ccc}-2&1\\-3&7\end{array}\right]$ . This multiplication is possible, because matrix A has 2 columns and matrix B has 2 rows. When those value are equal, the multiplication is possible.

AB = $\left[\begin{array}{ccc}-2&4\\1&3\end{array}\right]$ . $\left[\begin{array}{ccc}-2&1\\-3&7\end{array}\right]$ = $\left[\begin{array}{ccc}-14&26\\-11&22\end{array}\right]$

b) BA = $\left[\begin{array}{ccc}-2&1\\-3&7\end{array}\right]$ . $\left[\begin{array}{ccc}-2&4\\1&3\end{array}\right]$ = $\left[\begin{array}{ccc}5&-5\\13&9\end{array}\right]$

c) As, we can see, parts a and b are differents.

d) With matrices, multiplication is not commutative, which means AB≠BA

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4 years ago

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What is the solution? <br><br> -6+x5=6x-7

Margarita [4]

-6 + 5x = 6x - 7 Subtract 5x from both sides
-6 = x - 7 Add 7 to both sides
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x = 1

4 0

4 years ago