3 years ago

In how many ways can nine books be arranged on a shelf if the three math books must be placed next to each other?

Mathematics

1 answer:

marusya05 [52]3 years ago

4 0

C 40,320 is. The answer

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3. In the cube shown, find: a) BD b) AS c) BS d) the angle SBD e) the angle ASB

Natali [406]

Answer:

the answer of this question is A

Step-by-step explanation:

3 0

3 years ago

Hiii guys i need help with my homewrok <img src="https://tex.z-dn.net/?f=-9%5Cleq%207-8x" id="TexFormula1" title="-9\leq 7-8x" a

Illusion [34]

Answer:

The answer is x ≤ 2.

Step-by-step explanation:

Firstly, you have to move the unrelated term to the other side :

$- 9 \leqslant 7 - 8x$

$- 9 - 7 \leqslant - 8x$

$- 16 \leqslant - 8x$

Next you can solve it :

$- 8x \geqslant - 16$

$x \leqslant - 16 \div - 8$

$x \leqslant 2$

*Remember to change the symbol, when it is dividing by a negative value

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3 years ago

Which ordered pair is a solution to the system of linear equations Y= -7x+2 and y=9x-1

evablogger [386]

$\left\{\begin{array}{ccc}y=-7x+2\\y=9x-1\end{array}\right\Rightarrow 9x-1=-7x+2\\\\9x-1=-7x+2\ \ \ |+1\\9x=-7x+3\ \ \ |+7x\\16x=3\ \ \ \ |:16\\x=\dfrac{3}{16}\\\\\text{substitute the value of x to the second equation}\\\\y=9\cdot\dfrac{3}{16}-1\\\\y=\dfrac{27}{16}-\dfrac{16}{16}\\\\y=\dfrac{11}{16}\\\\\text{The solution is}\ \left(\dfrac{3}{16};\ \dfrac{11}{16}\right)$