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3 years ago

Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!

Mathematics

1 answer:

lora16 [44]3 years ago

3 0

Answer:

CosB = 0.8

Step-by-step explanation:

We know

CosB = b/h

And given, b = 12 and h =15

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The row-echelon form of the augmented matrix of a system of equations is given. Find the solution of the system.

Zepler [3.9K]

Answer:

option-C

Step-by-step explanation:

We are given row-echelon form

So, we can write equation from matrix as

$x-5z=-3$

$y-4z=-5$

Let's assume

$z=t$

now, we can find x and y

$x-5t=-3$

$x=5t-3$

$y-4t=-5$

$y=4t-5$

so, we get solutions as

$x=5t-3$

$y=4t-5$

$z=t$

where t can be any real numbers

6 0

3 years ago

Read 2 more answers

Can someone please help me with question 7?

storchak [24]

The goal is to raise AT LEAST $180, so this automatically indicates that the amount of keychains sold with the price must be the same or more than $180.

k = number of keychains

each keychain is $2.25

2.25k ≥ 180

divide both sides by 2.25 to get the k alone

k ≥ 80

The answer is 2.25k ≥ 180, k ≥ 80

(Hope this isn't confusing)

6 0

3 years ago

I really suck at algebra 2

Gnom [1K]

Answer:

-1

Step-by-step explanation:

5^(3b-1) = 5^(b-3)

3b-1=b-3 / +1 -b

2b = -2

b = -1

8 0

3 years ago

In square ABCD, point M is the midpoint of side AB and point N is the midpoint of side BC. What is the ratio of the area of tria

ipn [44]

Answer:

1:8

Step-by-step explanation:

Given that in square ABCD, point M is the midpoint of side AB and point N is the midpoint of side BC.

Let the side of the square be a.

Area of square ABCD = $a^2$

The triangle AMN is having two legs of a right triangle as half of side of the square

i.e. Triangle AMN has base = height = a/2

So area of triangle AMN = $\frac{1}{2} bh\\=\frac{a^2}{8}$

Ratio of the area of triangle AMN to area of square ABCD

= 1:8

6 0

3 years ago

Select three major processes that should be included in a model that explains the changes seen in the rock between figure 1 and

Arturiano [62]

Answer:

I think it's C and F. Don't depend on me tho I'm only in the 7th grade but I just told what I think is more logical

5 0

3 years ago