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wlad13 [49]
4 years ago
15

Help me to solve this questions please!!!!?!?!??!!

Mathematics
1 answer:
Inessa05 [86]4 years ago
7 0
In question 5.....x= 140 °

as angle D= 65°
so x= 360-65-155 = 140

if you want to ask how I get D= 65.... comment !
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How do you solve quadratic equations by using the Quadratic<br> Formula?
Dvinal [7]

If anything is unclear , Please notify me.

I have solved some examples. it's in the picture.

8 0
4 years ago
Simplify. -2xyz(xy 3yz)
vladimir2022 [97]
-2xyz(xy + 3yz) = -2x^2 y^2 z - 6x y^2 z^2
8 0
3 years ago
2. Refer to matrix B and identify the matrix element b11<br> -3<br> 6<br> 1/2
Valentin [98]

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete as the matrix is not given.

The general form of a matrix is:

b[m*n] =\left[\begin{array}{ccc}b_{11}&b_{12}&b_{13}........b{1n}}\\b_{21}&b_{22}&b_{23}........b{2n}\\b_{31}&b_{32}&b_{33}........b{3n}\\ \\ \\b_{m1}&b_{m2}&b_{m3}........b{mn}\end{array}\right]

Where m and n represent the number\ of\ rows\ and\ columns respectively.

Notice the position of b11

This means that b11 is at the first column and first row.

Take for instance matrix b is:

b = \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]

The element at the first row and first column is 1.

Hence

b_{11} = 1

8 0
3 years ago
In ΔSTU, the measure of ∠U=90°, UT = 80, SU = 39, and TS = 89. What ratio represents the tangent of ∠S?
Vsevolod [243]

Answer:

\frac{80}{39}

Step-by-step explanation:

SOHCAHTOA

O =Opposite

A = Adjacent

H = Hpotenuse

If we draw it out we can see that the opposite side is the UT and adjacent side is SU for ∠S.

When an angle is asked for like here is S so the opposite side of the angle is the opposite side. and the angle close to it is the adjacent. The biggest side is the hypotenuse.

6 0
3 years ago
Which of the following is the best approximation of the volume of a sphere with a 7 cm radius?
White raven [17]

To find the volume of a sphere you would use the equation: \frac{4}{3}πr³

You would plug in the radius in r

Your equation would look like this now:

\frac{4}{3}π(7)³

When you solve that you would get:

1436

Since it's 3 dimentional you would use ⇒ ³

Your answer would be B. 1436cm³


8 0
3 years ago
Read 2 more answers
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