Help me please and thank you

Mathematics

1 answer:

castortr0y [4]2 years ago

4 0

Answer.

Attached my answer, hope that helps...

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1. Can cross multiplication be used to solve this problem? Why or why not?<br><br><br> HELP

garri49 [273]

Answer:

Step-by-step explanation:

Cross multiplication can be used but not in the beginning. First x should be isolated.

$3 +\frac{5}{x}=\frac{7}{x}\\\\$

Now subtract $\frac{5}{x}$ from both sides

$3 = \frac{7}{x}-\frac{5}{x}\\\\3=\frac{7-5}{x}\\\\3=\frac{2}{x}$

In this stage, cross multiplication can be used.

$\frac{3}{1}=\frac{2}{x}\\\\3*x=2*1\\\\x = \frac{2}{3}$

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3 years ago

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Complete the equation using an area model 6 3/4 x 3 2/5=

Tanzania [10]

Answer:

22.95

Step-by-step explanation:

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3 years ago

A(4,-7) B(-2,1) find AB

Natali5045456 [20]

$\bf ~~~~~~~~~~~~\textit{distance between 2 points}\\\\A(\stackrel{x_1}{4}~,~\stackrel{y_1}{-7})\qquadB(\stackrel{x_2}{-2}~,~\stackrel{y_2}{1})\qquad \qquadd = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}\\\\\\AB=\sqrt{[-2-4]^2+[1-(-7)]^2}\implies AB=\sqrt{(-2-4)^2+(1+7)^2}\\\\\\AB=\sqrt{(-6)^2+8^2}\implies AB=\sqrt{36+64}\implies AB=\sqrt{100}\implies AB=10$