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inn [45]
3 years ago
14

3.

Mathematics
1 answer:
enot [183]3 years ago
8 0
309997373737737464737
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Laila read 36 pages in 4 hours. Which expression can be used to find the number of pages she read per hour?
scoray [572]
Lets see do 36/4 and you should have your answer
7 0
3 years ago
Read 2 more answers
Solve the following triangle in which given sides are<br> a=7 b=7 c=9
blagie [28]
We have an isosceles triangle;
A=opposite angle side a.
B=opposite angle side b.
C=opposite angle side c.

A=B
Method 1:

We can divide the isosceles triangle in two right triangles,
hypotenuse=7
side=9/2=4.5

B=A=arccossine (4.5/7)=49.994799...º≈50º
C/2=90º-50º=40º  ⇒ C=2*40º=80º

Answer:
a=7;  A=50º
b=7;  B=50º
<span>c=9;  C=80º

Method 2:
Law of cosines:
a²=b²+c²-2bcCosA  ⇒CosA=(a²-b²-c²)/(-2bc)
CosA=(49-49-81) / (-126)=0.642857
A=arco cos (81/126)≈50º

B=A=50º

A+B+C=180º
50º+50º+C=180º
C=180º-100º
C=80º

Answer:

</span>a=7;  A=50º
b=7;  B=50º
<span>c=9;  C=80º</span>

8 0
3 years ago
The matrix method is being used to solve the system of equations x + 2y = 4 and 3x - y = 6.
Ira Lisetskai [31]

Answer: b) multiply row 1 by -3 and add the result to row 2


Step-by-step explanation:


8 0
3 years ago
What is x. |x − 2| − 8 = 10
shusha [124]
The answer would be x = 9.
7 0
3 years ago
Read 2 more answers
Help me fast ASAP pls
Aleonysh [2.5K]

Answer:

C

Step-by-step explanation:

I got it right

5 0
3 years ago
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