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3 years ago

5

Phil and Mack made cookies for sale. After the sale, 20% of the cookies were left. If Phil's cookies were 25% more than Mack's,

how many cookies did Mack make?

1 answer:

Arte-miy333 [17]3 years ago

5 0

75% calculated ~I'll be happy to explain if needed!~ ;)

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Sqrt of 4a-4 + sqrt of a-1

Monica [59]

$\large\begin{array}{l} \textsf{Simplify the expression (I'm goint to call it E)}\\\\ \mathsf{E=\sqrt{4a-4}+\sqrt{a-1}} \end{array}$

$\large\begin{array}{l} \textsf{So E is a sum of two square roots. Notice that you can factor}\\\textsf{the 4 out on the first one:}\\\\ \mathsf{E=\sqrt{4\cdot a-4\cdot 1}+\sqrt{a-1}}\\\\ \mathsf{E=\sqrt{4\cdot (a-1)}+\sqrt{a-1}}\\\\ \mathsf{E=\sqrt{2^2\cdot (a-1)}+\sqrt{a-1}}\\\\ \mathsf{E=\sqrt{2^2}\cdot \sqrt{a-1}+\sqrt{a-1}}\\\\ \mathsf{E=2\cdot \sqrt{a-1}+\sqrt{a-1}} \end{array}$

$\large\begin{array}{l} \mathsf{E=2\cdot \sqrt{a-1}+1\cdot \sqrt{a-1}}\\\\ \mathsf{E=(2+1)\cdot \sqrt{a-1}}\\\\ \boxed{\begin{array}{l}\mathsf{E=3\cdot \sqrt{a-1}} \end{array}} \end{array}$

If you're having problems understanding this answer, try seeing it through your browser: brainly.com/question/2179170

$\large\textsf{I hope this helps. :-)}$

Tags: <em>square root sqrt simplify expression radical irrational algebra</em>

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2 years ago

Shayla has 6 1/2 pounds of potato salad into containers each of which holds 1 5/8 pounds. How many containers does she need?

Oksi-84 [34.3K]

let's firstly convert the mixed fractions to improper fractions and then divide.

$\bf \stackrel{mixed}{6\frac{1}{2}}\implies \cfrac{6\cdot 2+1}{2}\implies \stackrel{improper}{\cfrac{13}{2}}~\hfill \stackrel{mixed}{1\frac{5}{8}\implies \cfrac{1\cdot 8+5}{8}}\implies \stackrel{improper}{\cfrac{13}{8}} \\\\[-0.35em] ~\dotfill$

$\bf \stackrel{\textit{total salad}}{\cfrac{13}{2}}\div \stackrel{\stackrel{\textit{conainer's}}{\textit{capacity}}}{\cfrac{13}{8}}\implies \cfrac{\begin{matrix} 13 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}{\underset{1}{\begin{matrix} 2 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}}\cdot \cfrac{\stackrel{4}{\begin{matrix} 8 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}}{\begin{matrix} 13 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}\implies 4$

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2 years ago

3x/5 - x = x/5 - 5/2?

laila [671]

X= 4.167 you cross multiply both the equations. so you get 30x - 50x = 10x - 125. you shift all the values of x on side and then divide it by 125 sso you get x= 4.167

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2 years ago

A tree casts a shadow 8 meters long. At the same time, a building 64 meters tall casts a shadow 16 meters long. To the nearest m

IceJOKER [234]

Answer:

32 meters

Step-by-step explanation:

If the trees shadow is half the height of the buildings shadow, then the tree is half the size of the building

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2 years ago

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Chen can ride his bike 3 miles in 15 minutes. How long will it take chen to ride 18 miles

RUDIKE [14]

Answer:

15*6 = 90 minutes (1 hour and 30 minutes)

Step-by-step explanation:

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2 years ago