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3 years ago

How do you solve this please help

Mathematics

1 answer:

dybincka [34]3 years ago

6 0

Since the triangles are congruent the angles given are the same. If we know triangles have 180 degrees total within their angles then 44 + 55 - 180 = 81 degrees. Z=81

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8x - 2y if x=3, y=5<br> (1) 24<br> (2) 15<br> (3) 14 <br> (4) 10

ladessa [460]

Answer: (4) 14

Step-by-step explanation:

8x - 2y if x is 3 and y is 5

8x = 24

2y = 10

24 - 10 = 14

So 8x - 2y is 14.

5 0

3 years ago

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Your class is learning to tie knots. Each student needs a piece of rope that is 38 yard long. How many yards of rope are needed

djyliett [7]

38 yard piece for each student and there are 16 students:

38*16=608

608 yards needed for your class

6 0

3 years ago

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Please help: linear algebra problem. (Linear combinations)

DochEvi [55]

Answer:

$\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right] \left[\begin{array}{ccc}c\\d\end{array}\right] =\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

This tells us that:

$A=\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right]$

$b=\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

Step-by-step explanation:

So we are saying we have scalars, c and d, such that:

$c\left[\begin{array}{ccc}5\\5\\ 3\end{array}\right]+d\left[\begin{array}{ccc}7\\-8\\-9\end{array}\right]=\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$ .

So we want to find a way to express this as:

Ax=b where x is the scalar vector, $\left[\begin{array}{ccc}c\\d\end{array}\right]$ .

So we can write this as:

$\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right] \left[\begin{array}{ccc}c\\d\end{array}\right] =\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

3 0

3 years ago

I mainly need help with #10, thank you!

Masja [62]

Answer:

10) 40

Step-by-step explanation:

just subtract 95 and 55

8 0

3 years ago

How do you change 24 2\5 into decimal?

seropon [69]

24 and 2/5=24+2/5
24=24

0.1=1/10
2/5=x/10
times both sides by 10
20/5=x
4=x
2/5=4/10=0.4

24 and 2/5=24+0.4=24.4

5 0

2 years ago

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