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3 years ago

Dirk plants 12 seedlings in 8 min. At this rate, how many seedlings could he plant in 70 min?

Mathematics

1 answer:

Zigmanuir [339]3 years ago

8 0

The answer to this question is B. 105

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Create a matrix that is equal to F+G. The first matrix below is named F and the second matrix below is named G. Name the new mat

likoan [24]

F+G:

$F+G=\begin{bmatrix}{-1.8} & {-8.6} & {} \\ {2.85} & {-1.4} & {} \\ {-1.8} & {5.1} & {}\end{bmatrix}+\begin{bmatrix}{1.32} & {-1.9} & {} \\ {2.25} & {0.0} & {} \\ {-6.2} & {1.4} & {}\end{bmatrix}$

Then, add the elements that occupy the same position:

$H=\begin{bmatrix}{-1.8+1.32} & {-8.6+(-1.9)} & {} \\ {2.85+2.25} & {-1.4+0.0} & {} \\ {-1.8+(-6.2)} & {5.1+1.4} & {}\end{bmatrix}$

Solve

$H=\begin{bmatrix}{-0.48} & {-10.5} & {} \\ {5.1} & {-1.4} & {} \\ {-8} & {6.5} & {}\end{bmatrix}$

So, we find the element at address h31:

$H=\begin{bmatrix}{h11} & {h12} & {} \\ {h21} & {h22} & {} \\ {h31} & {h32} & {}\end{bmatrix}$

In this case, position h31 is - 8.0

8 0

1 year ago

A fruit vendor has 28 pears and 16 oranges.

Westkost [7]

<span>16:28 is the ratio But you have to get that in the simplest form so it would be 4:7</span>

3 0

3 years ago

Read 2 more answers

Which are the possible side lengths of a triangle?

vova2212 [387]

Do you know what the answer choices are?

4 0

3 years ago

Read 2 more answers

Could yall please help me out w this

DENIUS [597]

Answer:

answer is ........ C

Step-by-step explanation:

7 0

3 years ago

There is a total of 45 boys and girls in a choir.

rusak2 [61]

Answer:

16.5 year

Step-by-step explanation:

Using, mean = sum/no. *of observations

Here,

=> 16.2 = (sum of ages of boys)/18

=> 16.2 x 18 = sum of ages of boys

=> 291.6 = sum of ages of boys

Similarly, sum of ages of girls = 27 x 16.7 = 450.9

Mean(total) = (sumof agesof boys + girls)/45

Mean = (291.6 + 450.9)/45 = 16.5

3 0

3 years ago

Read 2 more answers