3 years ago

X – 9 > -5 I need to find the number to X

Mathematics

1 answer:

Natasha2012 [34]3 years ago

3 0

Answer:

x > 4 for an inequality :)

Step-by-step explanation:

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Ann [662]

value of above expression is 1

solution in attachment !

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2 years ago

Nick has $32. He buys 5 packs of trading cards that cost $3 each and a display book that costs $7. Simplify the expression 32-(5

Naya [18.7K]

Answer:

Step-by-step explanation:

32 - (5 x 3 + 7) first do the multiplication - order of operations is important!

32 - (15 + 7) then combine the numbers in the parentheses

32 - 22 now subtract

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3 years ago

What is 0.46 cm converted into millimeters

Arte-miy333 [17]

1cm = 10mm
then 0.46cm = 0.46*10 = 4.6mm

6 0

3 years ago

Read 2 more answers

1. 8q + 6; q = 2

charle [14.2K]

1. 22
2. -3
3. 21
4. 3.6
5. 22
6. 6
7. 18
8. 6
9. 24
10. 1

5 0

3 years ago

Estimate the integral ∫6,0 x^2dx by the midpoint estimate, n = 6

Anettt [7]

Splitting up the interval [0, 6] into 6 subintervals means we have

$[0,1]\cup[1,2]\cup[2,3]\cup\cdots\cup[5,6]$

and the respective midpoints are $\dfrac12,\dfrac32,\dfrac52,\ldots,\dfrac{11}2$ . We can write these sequentially as ${x_i}^*=\dfrac{2i+1}2$ where $0\le i\le5$ .

So the integral is approximately

$\displaystyle\int_0^6x^2\,\mathrm dx\approx\sum_{i=0}^5({x_i}^*)^2\Delta x_i=\frac{6-0}6\sum_{i=0}^5({x_i}^*)^2=\sum_{i=0}^5\left(\frac{2i+1}2\right)^2$

Recall that

$\displaystyle\sum_{i=1}^ni^2=\frac{n(n+1)(2n+1)}6$
$\displaystyle\sum_{i=1}^ni=\frac{n(n+1)}2$
$\displaystyle\sum_{i=1}^n1=n$

so our sum becomes

$\displaystyle\sum_{i=0}^5\left(\frac{2i+1}2\right)^2=\sum_{i=0}^5\left(i^2+i+\frac14\right)$
$=\displaystyle\frac{5(6)(11)}6+\frac{5(6)}2+\frac54=\frac{143}2$

8 0

3 years ago