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Romashka-Z-Leto [24]
3 years ago
10

Solve. 3x + 2y = 7 and 4x – 3y = -2

Mathematics
2 answers:
lapo4ka [179]3 years ago
4 0

just look up math papa algebra calculator it gives you the answer and explains it step by step :)

ZanzabumX [31]3 years ago
4 0
X
=
1
and
y
=
2
This is the answer
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Explain the difference between a square pyramid and a square prism.
Maslowich
The square pyramid looks exactly how it sounds. The base of the shape is a square and has 4 isosceles triangles that meet at a point. The square prism is like a 3D rectangle. It has 4 rectangles and 2 squares to close the shape.
Hope this helped.
3 0
3 years ago
Sally and Ann share £30 in the ratio 3:2. Sally keeps the biggest share. How much does she get.
77julia77 [94]
3x+2x=30
5x=30
x=5
3(5)= 15
4 0
3 years ago
Help me please :) its very hard
postnew [5]

Answer:

Answer B

Step-by-step explanation:

You need to first find the surface area of the triangular prism.

In order to do that, we need to first know the length of the base of the triangles on both side. So, I used the pythagorean theorem (a²+b²=c²) after making the triangle a right triangle by cutting it in HALF.

a²+b²=c²

a²+2.6²=3²

a²+6.76=9

Subtract 6.76 on both sides

a²=2.24

a=√2.24

a=1.49666295471

Now, we know that the base of HALF of the triangles on both sides of the prism is 1.496......

We need to MULTIPLY this by 2 to get the full length. So, the length of the bases of both triangles is 2.99332590942

The height of the triangles is 2.6

We are going to first find the area of one triangle and multiply it by 2, to get the area of both triangles.

Area of a triangle = base x height ÷ 2

2.6 x 2.99332590942= 7.78264736449

7.78264736449 ÷ 2 = 3.89132368224

3.89132368224 x 2 (because we have 2 triangles) =7.78264736449  cm squared

Now, we know the area of both triangles, but we now need to add the add the surface area of the rectangles in the net.

Area of a rectangle = length x width

We know that all of the three rectangles are equal in size, and that the length of each one of them is 15 cm. However, the width/height of each one is unknown. We will find out the height of each one by looking at the length of the base of the triangle attached to the first one. We know that because of the base of the triangles = 2.99332590942, the width of the attached rectangles are 2.99332590942. We found this using the Pythagorean theroem (look above).

15 x 2.99332590942= 44.8998886413

44.8998886413 x 3 (because we have 3 of the same rectangles)= 134.699665924 cm squared

Now, we must ADD the surface area of the rectangles AND the triangles.

7.78264736449 (triangles) + 134.699665924 (the three rectangles)= 142.482313288 cm squared.

The CLOSEST OPTION to the answer we got is ANSWER B because it is 142.8 cm squared, which is the closest to the answer we got which was 142.482313288 cm squared.

I really hope this helps :)

6 0
3 years ago
Read 2 more answers
Her investment grew 22% to$610 how much did she invest____ ( solve as an equation or fraction)
Ivan
X + 0.22x = 610
1.22x = 610
x = 500

$500
5 0
3 years ago
2x - y&gt;5<br> 5x + 4y s 20<br> pls answer!!!
sweet [91]

Answer:

the last answer

Step-by-step explanation:

6 0
2 years ago
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