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gulaghasi [49]
3 years ago
14

the price of 3 t-shirts is 42$. If each t-shirt costs the same amount, how much does Robert save by using a 20%-off coupon to bu

y 5 t-shirts.
Mathematics
2 answers:
olya-2409 [2.1K]3 years ago
7 0
$42 ÷ 3 = $14 (price of one t-shirt)
$14 × 5 = $70 (price of five t-shirts)

now find 10% of $70:
$70 ÷ 10 = $7

multiply the 10% by two to get 20%:
$7 × 2 = $14

So Robert saves $14, leaving him with a price of $56
kipiarov [429]3 years ago
5 0
42/3=14 (price of one shirt) 100-20=80 (robert buys 5 shirt each costing 80% of the original price) 14/100x80=11.20 (price of one shirt with a 20% discount) 11.20x5=56 cost of all 5 shirts
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Step-by-step explanation:

<h3>Need to FinD :</h3>

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\red{\frak{Given}} \begin{cases} & \sf{The\ measure\ of\ one\ angle\ of\ traingle\ is\ {\pmb{\sf{10^{\circ}}}}.} \\ & \sf{The\ other\ two\ angles\ are\ in\ the\ ratio\ of\ {\pmb{\sf{3\ :\ 14}}}.} \end{cases}

We know that,

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Angle sum property,

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\rule{200}{3}

\sf \dashrightarrow {10^{\circ}\ +\ 3x\ +\ 14x\ =\ 180^{\circ}} \\ \\ \\ \sf \dashrightarrow {10^{\circ}\ +\ 17x\ =\ 180^{\circ}} \\ \\ \\ \sf \dashrightarrow {17x\ =\ 180^{\circ}\ -\ 10^{\circ}} \\ \\ \\ \sf \dashrightarrow {17x\ =\ 170^{\circ}} \\ \\ \\ \sf \dashrightarrow {x\ =\ \dfrac{\cancel{170^{\circ}}}{\cancel{17}}} \\ \\ \\ \dashrightarrow {\underbrace{\boxed{\pink{\frak{x\ =\ 10^{\circ}.}}}}_{\sf \blue {\tiny{Value\ of\ x}}}}

∴ Hence, the value of x is 10°. Now, let us find out the other two angles of the triangle.

\rule{200}{3}

Second AnglE :

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\rule{200}{3}

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Collect like terms

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Multiply both sides by -1

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