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3 years ago

15

A sweater is on sale for 20% off the original price, x.

1 answer:

sergey [27]3 years ago

7 0

a decrease of 20% means u r paying 80%.......so a decrease of 20% is the same as multiplying by 80%

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I need help<br> someone pls

Alborosie

Answer:

≈ 66.5 m

Step-by-step explanation:

Using the sine ratio in the right triangle

sin12° = $\frac{opposite}{hypotenuse}$ = $\frac{d}{320}$ ( multiply both sides by 320 )

320 × sin12° = d , then

d ≈ 66.5 m ( to 1 dec. place )

8 0

3 years ago

An equilateral triangle has an altitude length of 36 feet. Determine the length of a side of the triangle.

liq [111]

$\bf \textit{height of an equilateral triangle}\\\\
h=\cfrac{s\sqrt{3}}{2}\quad 
\begin{cases}
s=\textit{length of a side}\\
---------\\
h=36
\end{cases}\implies 36=\cfrac{s\sqrt{3}}{2}
\\\\\\
72=s\sqrt{3}\implies \cfrac{72}{\sqrt{3}}=s~~\stackrel{rationalizing~it}{\implies }~~\cfrac{72}{\sqrt{3}}\cdot \cfrac{\sqrt{3}}{\sqrt{3}}\implies \cfrac{7\sqrt{3}}{3}$

3 0

3 years ago

There are four children in a family, two girls, Kate and sally, and two boys, tom and Ben.

scZoUnD [109]

Answer:

Bren=5 years

Tom=7yrs

Sally=4 yrs

Kate=8years

Step-by-step explanation:

-Let Bren's current age be x, therefore Tom is x+2

-Let Sally's current age be y, therefore Kate is 2y

-Also, given that:

$x+x+2=2y+y\\\\2x+2=3y\ \ \ \ \ \ ...i$

#We calculate the ages one year ago of Tom and Sally:

$\#Tom's \age\\x+2-1=x+1\\\\\# Sally's \ age\\=y-1\\\\\therefore x+1=2(y-1)\\\\x=2y-3\ \ \ \ \ ...ii$

#Substitute for x in i;

$2x+2=3y\\\\2(2y-3)+2=3y\\\\4y-6+2=3y\\\\y=4\\\\2y=4\times 2=8\\\\2x+2=4+8=12\\\\2x=10\\\\x=5\\\\(x+2)=7$

6 0

3 years ago

Solve the measurement equations<br> 7 ft. + 5 in. = ____ in. <br> 1.<br> 2. S<br> 3.

Korvikt [17]

Answer:

89

Step-by-step explanation:

Plz give me brianliest thanks

5 0

3 years ago

Read 2 more answers

Find x please<br><br><br> 10.3<br><br><br> 9.6<br><br><br> 84<br><br><br> 9

valentinak56 [21]

The 2 small black lines through the sides of the triangle indicate that the 2 sides are the same length.

Because the 2 sides are the same the 2 bottom angles are also the same.

This means that 9x +3 = 84

Now we can solve for x:

9x +3 = 84

Subtract 3 from each side:

9x = 91

Divide both sides by 9:

x = 81 / 9

x = 9

4 0

4 years ago