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jeka57 [31]
4 years ago
10

2 lb 6oz = ________lb

Mathematics
1 answer:
krok68 [10]4 years ago
5 0
2.6 lb

Hope this helps!

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In triangle abc, m of acb = 90, cd is perpendicular to ab , m of acd is 60. and bd is 5 cm. find ad
weeeeeb [17]

Let us draw a picture to make the things more clear.

Attached is the image.

We have been given that

\angle acd = 60 ^{\circ}

Therefore, we have

\angle dcb =90- 60= 30 ^{\circ}

Now, in triangle bcd, we have

\tan30 = \frac{5}{cd}\\
\\
\frac{1}{\sqrt 3}=\frac{5}{cd}\\
\\
cd=5\sqrt 3

Now, in triangle acb, we have

tan 60 = \frac{ad}{5\sqrt3} \\
\\
\sqrt 3=  \frac{ad}{5\sqrt3}\\
\\
ad= 5\sqrt3 \times \sqrt 3\\
\\
ad= 5\times 3\\
\\
ad=15

Thus, ad is 15 cm.


4 0
3 years ago
Solve the following system using the substitution method. Show all work! <br> 4x+y=14 <br> x-2y=8
Serjik [45]

Answer:

Step-by-step explanation:

4x+y=14

x-2y=8

then;

x=8-2y

substitute;

4(8-2y)+8-2y=14

32-8y+8-2y=14

40-10y=14

26=10y

y=2.6 , work out 4x+2.6=14 to get x

6 0
3 years ago
Read 2 more answers
An employee earns $175 for 15 hours work.<br> Find the constant of variation.
LiRa [457]

Answer:

11.67

Step-by-step explanation:

Given: Employee earn $175 for 15 hours

We know, the constant of variation means the rate of change.

To know The constant of variation, we need to find how much employee earn each hour.

∴ Constant of variation= \frac{Total\ earning}{Total\ working\ hours}

Constant of variation= \frac{175}{15}= 11.666

∴ Constant of variation= 11.67. (rounding off)

8 0
3 years ago
Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 3
barxatty [35]

when a=4 and b=3,

3.14((4 x 2)+ (4 x 3)) = 3.14(8+12) = 3.14 x 20 = 62.8

7 0
3 years ago
A square with shaded 2/5
skelet666 [1.2K]
The answer is C 2/5 = 0.4
4 0
3 years ago
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