I need help please.

Mathematics

2 answers:

ira [324]3 years ago

7 0

Answer: 3,168

Step-by-step explanation: If You Multiply The Original Cost Of The Textbook By 33 You Will Get A Product Of 3,186

Mandarinka [93]3 years ago

7 0

To find out the cost for the class itself we must understand what the product is and in this case it is the biology book and the prices of which ranges to $96

Now there are 33 students in a class and each on of which wants a textbook

So we multiply 96 by 33 giving us the amount of $3168 for the cost of biology textbook

The answer is $3168

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3 years ago

Angles U and V are supplementary angles. The ratio of their measures is 7:13 Find the measure of each angle

GREYUIT [131]

If $u$ and $v$ are supplementary angles, then

$u+v=180^{\circ}~~~~~\mathbf{(i)}$

The ratio of $u$ and $v$ is $\dfrac{7}{13}:$ 

$\dfrac{u}{v}=\dfrac{7}{13}\\\\\\ u=\dfrac{7v}{13}~~~~\mathbf{(ii)}$

Substitute $\mathbf{(ii)}$ into $\mathbf{(i)}:$

$\dfrac{7v}{13}+v=180^{\circ}\\\\\\ \left(\dfrac{7}{13}+1 \right )\cdot v=180^{\circ}\\\\\\ \left(\dfrac{7}{13}+\dfrac{13}{13} \right )\cdot v=180^{\circ}\\\\\\ \dfrac{20}{13}\cdot v=180^{\circ}\\\\\\ v=180^{\circ}\cdot \dfrac{13}{20}\\\\\\ \boxed{\begin{array}{c} v=117^{\circ} \end{array}}$

From $\mathbf{(i)},$ we find the measure of $u:$

$u=180^{\circ}-v\\\\ u=180^{\circ}-117^{\circ}\\\\ \boxed{\begin{array}{c} u=63^{\circ} \end{array}}$

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3 years ago

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Temka [501]

Answer:

Step-by-step explanation:

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