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aniked [119]
3 years ago
11

Please answer it now in two minutes

Mathematics
1 answer:
Natali [406]3 years ago
4 0

Answer: 25.67°

Step-by-step explanation:

Tangent = opp/adj

7/3 = 2.333

To get degrees, take tan^-1 of 2.33 25.666. round to 25.7 or 25.67°

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Please help me <br>ineed it now ​
yanalaym [24]

Answer:

look at explanation

Step-by-step explanation:

To solve all of these questions you just need to scale. While scaling you can divide or multiply.

1. \frac{180 km}{4 hrs} (divide by 4 to get unit rate)

     unit rate = \frac{45km}{1hr}

2. If it takes one hour to travel 40 miles, then we don't have to scale or anything. We know \frac{40 miles}{1 hr}, the answer is...

"It'll only take one hour to travel 40 miles. This is correct because the unit rate is \frac{40 miles}{1 hr}. "

3. Knowing that the constant speed of the plane is \frac{800 km}{1 hour\\}, we can scale then add half of the unit rate to get our answer.

\frac{800 km}{1 hour\\} x 3 = \frac{2400 km}{3 hrs}   800 x 3 = 2400

then add half of unit rate which is \frac{400 km}{30 mins}  \sqrt[2]{800} = 400

so, our answer is \frac{2800 km}{3.5 hours}

4.  \frac{3km}{30 mins} <--- ( divided by 2) \frac{6 km}{1 hr} ( multiplied x 2.5) ---> \frac{15 km}{2.5 hrs}

To get an easier way to find the answer, if possible you can scale back farther than the 1 hour mark.

Elmer would take 2 and a half hours to ride 15 km.

5. The boys speed is \frac{4 km}{1 hr}. All we need to do is divide by 2. \sqrt[2]{8} = 4

3 0
3 years ago
I need help please! How do i know which is the correct answer.
hichkok12 [17]

Answer:

C

Step-by-step explanation:

since there cant be technically half of someone (i hope not) the domain has to be "whole numbers". hours can be split, so they are "all numbers". well, looking at it again, it is C, since the others can not possibly be correct.

3 0
3 years ago
Make a Matlab script to make row 2 of matrix A equal to first row of A multiplied by the negative of the first element of row 2
stira [4]

Answer:

X=\begin{Bmatrix}2& 1 &10 \\-3 & 5 & 4\end{Bmatrix}

Step-by-step explanation:

From the question we are told that

Matrix is given as A=\begin{Bmatrix}2 & -1 & 10\\-3 & 8 & 4\end{Bmatrix}

Generally let the change in matrix be given as X

X_1_2 = 2*(-(-1)) + - 1 = 1X_2_2 = -3 * (-(-1))+ 8 = 5

Matlab output

A=[2 -1 10;-3 8 4]\\a=(A(1,1)*-A(1,2))+A(1,2)\\b=(A(2,1)*-A(1,2))+A(2,2)\\X=[A(1,1) a A(1,3); A(2,1) b A(2,3)]\\

Generally the matrix that makes row 2 of matrix A equal to first row of A multiplied by the negative of the first element of row 2 plus the original row is

X=\begin{Bmatrix}2& 1 &10 \\-3 & 5 & 4\end{Bmatrix}

6 0
2 years ago
3/7 of the students in a school are in sixth grade.
Andre45 [30]

Answer:

90 students

Step-by-step explanation:

Set up a proportion

3/7 = x/210 cross multiply and solve for x

7 0
3 years ago
A circles diameter is 10 yards what is the circles area using 3.14
faltersainse [42]
3.14 of 100 =314 that the answer
7 0
3 years ago
Read 2 more answers
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