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3 years ago

31. Dorothy buys her groceries online. The total cost that Dorothy pays is the sum of the

Mathematics

1 answer:

raketka [301]3 years ago

5 0

Answer:

D) R = x + 6.1

Step-by-step explanation:

Let x represent groceries

R represents the total cost

Total cost = cost of groceries + flat rate shipping fee

R = x + 6.1

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If x to the power of 2 equals 196 what does x equal

natulia [17]

Answer:

Step-by-step explanation:

<h2><u>Solve for x</u></h2>

<u /> $x^{2} = 196$

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3 years ago

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diamong [38]

Answer:

10-5 $\sqrt{2}$

Step-by-step explanation:

As per the attached figure, right angled $\triangle MDL$ has an inscribed circle whose center is $I$ .

We have joined the incenter $I$ to the vertices of the $\triangle MDL$ .

Sides MD and DL are equal because we are given that $\angle M = \angle L = 45 ^\circ.$

Formula for <em>area</em> of a $\triangle = \dfrac{1}{2} \times base \times height$

As per the figure attached, we are given that side <em>a = 10.</em>

Using pythagoras theorem, we can easily calculate that side ML = 10 $\sqrt{2}$

Points P,Q and R are at $90 ^\circ$ on the sides ML, MD and DL respectively so IQ, IR and IP are heights of $\triangle$ MIL, $\triangle$ MID and $\triangle$ DIL.

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$\text {Area of } \triangle MDL = \text {Area of } \triangle MIL +\text {Area of } \triangle MID+ \text {Area of } \triangle DIL$

$\dfrac{1}{2} \times 10 \times 10 = \dfrac{1}{2} \times r \times 10 + \dfrac{1}{2} \times r \times 10 + \dfrac{1}{2} \times r \times 10\sqrt2\\\Rightarrow r = \dfrac {10}{2+\sqrt2} \\\Rightarrow r = \dfrac{5\sqrt2}{\sqrt2+1}\\\text{Multiplying and divinding by }(\sqrt2 +1)\\\Rightarrow r = 10-5\sqrt2$

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3 years ago

How much is 70% of 140 ?<br><br>thankyou ~

Paul [167]

Answer:

Step-by-step explanation:

Of means multiply

70% * 140

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