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soldi70 [24.7K]
3 years ago
15

a painting including the frame measures 71 cm by 75 cm How many centimeters of framing were needed to frame the​ painting?

Mathematics
1 answer:
san4es73 [151]3 years ago
7 0

I think 292cm, because it is asking for the perimeter

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4x+3y=20<br> 2x+y=7<br> How do I solve this? I forgot how to do it :/ also no answer choice
Crank

So for this, I will be using the substitution method. Firstly, subtract both sides in the second equation by 2x: 4x+3y=20\\ y=7-2x

Next, substitute y in the first equation with 7-2x, then solve for x from there:

4x+3(7-2x)=20\\ 4x+21-6x=20\\ -2x+21=20\\ -2x=-1\\ x=\frac{1}{2}

Now that we got x, substitute it into either equation to solve for y:

4*\frac{1}{2}+3y=20\\ 2+3y=20\\ 3y=18\\ y=6\\ \\ 2*\frac{1}{2}+y=7\\ 1+y=7\\ y=6

In short, x = 1/2 and y = 6.

6 0
3 years ago
3. The picture below shows a relationship between the number of circles and triangles.
dimaraw [331]

Answer:

D or A

Step-by-step explanation:

(D) One circle : four triangles  

  Example:

One triangle is 1/4 of a circle

(A) One circle : four triangles

    Example:

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6 0
3 years ago
Find f(x) and g(x) so that the function can be described as y = f(g(x)). y = 3/ square root of 3x + 4
Elis [28]
Well, your equation y=3/SQRT(3x+4) should be rationalized, but that's not what you want.

If f(x) = 3/SQRT(x+4) and g(x) = 3x

f(g(x)) then = 3/SQRT(3x+4), but rationalizing this = 3SQRT(3x+4)/(3x+4)

3 0
3 years ago
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if a shape is a regular pentagon with five sides, which of the following must be true? Check all that apply
julsineya [31]

Answer:

A. It has reflectional symmetry

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Step-by-step explanation:

we know that

A regular pentagon has 5 sides and 5 lines of symmetry. The number of lines of symmetry in a regular polygon is equal to the number of sides

Every regular polygon has reflectional symmetry

Regular polygons are symmetrical

therefore

A. It has reflectional symmetry ------> Is true

B. It is symmetrical -----> Is true

C. It has exactly one line of symmetry ----> Is false

D. It has five lines of symmetry -----> Is true

4 0
3 years ago
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Share 33 in the ratio 5:4:2
mr_godi [17]

Answer:

Step-by-step explanation:  to be honest i do not know

5 0
2 years ago
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