All categories

2 years ago

Write in summation notation.

Mathematics

1 answer:

Ivahew [28]2 years ago

3 0

If that is -2+1+4+13 I think it should be 16

You might be interested in

HELP ME PLS!!!!!!!!!!!!

melisa1 [442]

Answer:

Slope of Line 1 = 4/3

Slope of Line 2 = 1/2

Slope of Line 3 = 4/3

For each pairs of lines, determine whether they're parallel, perpendicular or either.

Line 1 and Line 2: neither

Line 1 and Line 3: parallel

Line 2 and Line 3: neither

6 0

2 years ago

likoan [24]

Answer: 230cm²

Step-by-step explanation:

>We can do this by splitting the figure into 2 trapeziums.

>Additionally, you can see that both trapeziums bear the same lengths a and b. Hence, we can use this formula: $\frac{1}{2} * (a+b) * (total height)$ .

>Thus,

Area = $\frac{1}{2} *(7+16)*20=230$

4 0

1 year ago

Read 2 more answers

Solve the triangle A = 2 B = 9 C =8

VARVARA [1.3K]

Answer:

$\begin{gathered} A=\text{ 12}\degree \\ B=\text{ 114}\degree \\ C=54\degree \end{gathered}$

Step-by-step explanation:

To calculate the angles of the given triangle, we can use the law of cosines:

$\begin{gathered} \cos (C)=\frac{a^2+b^2-c^2}{2ab} \\ \cos (A)=\frac{b^2+c^2-a^2}{2bc} \\ \cos (B)=\frac{c^2+a^2-b^2}{2ca} \end{gathered}$

Then, given the sides a=2, b=9, and c=8.

$\begin{gathered} \cos (A)=\frac{9^2+8^2-2^2}{2\cdot9\cdot8} \\ \cos (A)=\frac{141}{144} \\ A=\cos ^{-1}(\frac{141}{144}) \\ A=11.7 \\ \text{ Rounding to the nearest degree:} \\ A=12º \end{gathered}$

For B:

$\begin{gathered} \cos (B)=\frac{8^2+2^2-9^2}{2\cdot8\cdot2} \\ \cos (B)=\frac{13}{32} \\ B=\cos ^{-1}(\frac{13}{32}) \\ B=113.9\degree \\ \text{Rounding:} \\ B=114\degree \end{gathered}$ $\begin{gathered} \cos (C)=\frac{2^2+9^2-8^2}{2\cdot2\cdot9} \\ \cos (C)=\frac{21}{36} \\ C=\cos ^{-1}(\frac{21}{36}) \\ C=54.3 \\ \text{Rounding:} \\ C=\text{ 54}\degree \end{gathered}$

3 0

9 months ago

The product of two numbers is 10 times the value of 8 × 7. Which expression shows the two numbers?

Aleonysh [2.5K]

Answer: 7 x 80 i think

Step-by-step explanation:\

nothing

8 0

2 years ago

A sales girl earns a basic salary of shs.

yanalaym [24]

Answer:

c is the answer

Step-by-step explanation:

6 0

2 years ago