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3 years ago

If you Decrease £200 by 12.5% what do you get?

Mathematics

1 answer:

laila [671]3 years ago

8 0

Answer:

175

Step-by-step explanation:

Find how much is left by multiplying 200 by 0.875, since this will give you the remaining 87.5%:

200(0.875)

= 175

So, the answer is 175.

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Find the area of the figure

Evgesh-ka [11]

These are the steps:
1. Find area of the two triangles.
2. Find area of the rectangle.
3. Add them up.

Step 1: Find area of the two triangles:

Formula : Area of triangle = 1/2 x base x height

Both triangles are identical.
Height = 5m
Base = 6 + 6 + 12 = 24

Area = 1/2 x 24 x 5 = 60 m²

Step 2: Find the area of the rectangle:

Formula : Area = Length x Width

Area = 12 x 7 = 84 m²

Step 3: Find the total area:

60 + 84 = 144 m²

Answer: 144 m²

5 0

3 years ago

I would like to know how to solve this please.

QveST [7]

Here’s the answer:
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5 0

3 years ago

Find the value of the determinant using the method of expansion by minors; expand on the third row

valkas [14]

For the matrix

$\begin{bmatrix}{a_{11}} & {a_{12}} & {a_{13}} \\ {a_{21}} & {a_{22}} & {a_{23}} \\ {a_{31}} & {a_{32}} & {a_{33}}\end{bmatrix}$

the determinant using the method of expansion by minors, expanding on the third row is:

$\det \begin{bmatrix}{a_{11}} & {a_{12}} & {a_{13}} \\ {a_{21}} & {a_{22}} & {a_{23}} \\ {a_{31}} & {a_{32}} & {a_{33}}\end{bmatrix}=a_{31}\det \begin{bmatrix}{a_{12}} & {a_{13}} & {} \\ {a_{22}} & {a_{23}} & {} \\ {} & {} & {}\end{bmatrix}-a_{32}\det \begin{bmatrix}{a_{11}} & {a_{13}} & {} \\ {a_{21}} & {a_{23}} & {} \\ {} & {} & {}\end{bmatrix}+a_{33}\det \begin{bmatrix}{a_{12}} & {a_{12}} & {} \\ {a_{22}} & {a_{22}} & {} \\ {} & {} & {}\end{bmatrix}$

Answer:

First, we compute the determinants of the minors:

$\begin{gathered} \det \begin{bmatrix}{0} & {4} & {} \\ {-1} & {3} & {} \\ {} & {} & {}\end{bmatrix}=0+4=4, \\ \det \begin{bmatrix}{1} & {4} & {} \\ {1} & {3} & {} \\ {} & {} & {}\end{bmatrix}=3-4=-1, \\ \det \begin{bmatrix}{1} & {0} & {} \\ {1} & {-1} & {} \\ {} & {} & {}\end{bmatrix}=-1-0=-1. \end{gathered}$

Therefore:

$\det \begin{bmatrix}{1} & {0} & {4} \\ {1} & {-1} & {3} \\ {0} & {5} & {-2}\end{bmatrix}=0\times4-5\times(-1)+(-2)\times(-1)=5+2=7.$

3 0

1 year ago

What would be the slope for y=-7x + 2

skelet666 [1.2K]

Answer:

-7

Step-by-step explanation:

Hello!

This equation is in slope intercept form. The base equation is

y - mx +b

m is the slope

b is the y-intercept

Since -7 is in place of m -7 is the slope

The answer is -7

Hope this helps!

6 0

3 years ago

Read 2 more answers

Which lines are parallel in the regular pentagonal prism? Select each correct answer. CD←→ and HE←→ HE←→ and GF←→ FE←→ and

Fofino [41]

Opposite sides of any rectangular face are parallel, because opposite sides of a rectangle are parallel.

Since HCDE is a rectangle, CD ║ HE.

Since ABCH is a rectangle, AB ║ HC.

8 0

4 years ago

Read 2 more answers