All categories

3 years ago

Help no unhelpful answers pls

Mathematics

1 answer:

Lana71 [14]3 years ago

4 0

Answer:

2. 24

3. 32.5

Step-by-step explanation:

base ∙ height

–––––––––– = answer

Just plug in your base number and height number and multiply, then divide by 2.

You might be interested in

The line below are parallel. If the slope of the green line is 2/7, what is the slope of the red line?

professor190 [17]

Parallel lines have the same slope. So the slope of the other line =2/7

6 0

3 years ago

Read 2 more answers

Help please its geometry

Anna11 [10]

Answer:

Step-by-step explanation:

Opposite angles are equal in a parallelogram. Therefore 2 angles are 112°. Angles in a parallelogram or any quadrilateral are equal to 360°. To find the remaining sides: 360-(112×2) and divide your answer by 2.

4 0

3 years ago

Find the sum of a finite geometric sequence from n = 1 to n = 7, using the expression −4(6)n − 1.

Verizon [17]

Answer:

Step-by-step explanation:

The formula of a sum of terms of a gometric sequence:

$S_n=a_1\cdot\dfrac{1-r^n}{1-r}$

a₁ - first term

r - common ratio

We have

$a_n=-4(6)^{n-1}$

Calculate a₁. Put n = 1:

$a_1=-4(6)^{1-1}=-4(6)^0=-4(1)=-4$

Calculate the common ratio:

$r=\dfrac{a_{n+1}}{a_n}\\\\a_{n+1}=-4(6)^{n+1-1}=-4(6)^n\\\\r=\dfrac{-4(6)^n}{-4(6)^{n-1}}=6^n:6^{n-1}\\\\\text{use}\ a^n:a^m=a^{n-m}\\\\r=6^{n-(n-1)}=6^{n-n+1}=6^1=6$

$\text{Substitute}\ a_1=-4,\ n=7,\ r=6:\\\\S_7=-4\cdot\dfrac{1-6^7}{1-6}=-4\cdot\dfrac{1-279936}{-5}=-4\cdot\dfrac{-279935}{-5}=(-4)(55987)\\\\S_7=-223948$

7 0

4 years ago

1,78 scientific notation

pychu [463]

The answer is 7.8 x 10^4

6 0

4 years ago

Write a word problem that involves combining three equal groups

Artist 52 [7]

There are 6 pencils in each pencil box. There are 3 pencil boxes. How many pencils are there in total?

8 0

4 years ago