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nevsk [136]
3 years ago
12

Which number shows 6,312 rounded to the nearest ten? 6,300 6,310 6,320 6,330

Mathematics
2 answers:
Fiesta28 [93]3 years ago
7 0

1 is in the tens place

we look at 2

2 <5 so we leave it alone

6,310

Choice B

mart [117]3 years ago
3 0

tens are the second number after decimal

or in this number 7564  the 6 is the 10s number so it'd be 7560

so can you do yours now?  

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it is 8 if i substitute x for 3

Step-by-step explanation:

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2 years ago
If (ax+2)(bx+7)=15x2+cx+14 for all values of x, and a+b=8, what are the 2 possible values fo c
dolphi86 [110]

Given:

(ax+2)(bx+7)=15x^2+cx+14

And

a+b=8

Required:

To find the two possible values of c.

Explanation:

Consider

\begin{gathered} (ax+2)(bx+7)=15x^2+cx+14 \\ abx^2+7ax+2bx+14=15x^2+cx+14 \end{gathered}

So

\begin{gathered} ab=15-----(1) \\ 7a+2b=c \end{gathered}

And also given

a+b=8---(2)

Now from (1) and (2), we get

\begin{gathered} a+\frac{15}{a}=8 \\  \\ a^2+15=8a \\  \\ a^2-8a+15=0 \end{gathered}a=3,5

Now put a in (1) we get

\begin{gathered} (3)b=15 \\ b=\frac{15}{3} \\ b=5 \\ OR \\ b=\frac{15}{5} \\ b=3 \end{gathered}

We can interpret that either of a or b are equal to 3 or 5.

When a=3 and b=5, we have

\begin{gathered} c=7(3)+2(5) \\ =21+10 \\ =31 \end{gathered}

When a=5 and b=3, we have

\begin{gathered} c=7(5)+2(3) \\ =35+6 \\ =41 \end{gathered}

Final Answer:

The option D is correct.

31 and 41

8 0
1 year ago
Find the volume of a rectangular prism with a length of 9 cm, a height of 13 cm, and a width of 7 cm.
Sati [7]

Answer:

819 cm³

Step-by-step explanation:

V=L·H·W

V=9·13·7

V=819 cm³

4 0
2 years ago
Read 2 more answers
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