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Viktor [21]
2 years ago
15

In a group of Year 9 students, the ratio of boys to girls is 9 : 7. There are 4 more boys than girls in this group. How many stu

dents are in this group altogether?
Mathematics
1 answer:
KATRIN_1 [288]2 years ago
7 0

Answer: 32

Step-by-step explanation:

There are 18 boys and 14 girls (4 more boys than girls.  32 students total.

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Softa [21]

Answer:

(2)(120)(80) + (2)(120)(50) - (4)(60)(5²)

Step-by-step explanation:

The lateral faces of the building are the 4 sides of the building consisting:

2 rectangles of 120 ft by 80 ft

Area of the two rectangular faces = (2)(120)(80)

And

2 rectangles of 120 ft by 50 ft

Area of the two rectangular faces = (2)(120)(50)

✔️Total lateral surface area of the building = (2)(120)(80) + (2)(120)(50)

Note: we are asked to find the expression that represents the total surface area that needs to be painted given that there are 60 windows on each lateral face of the building of the shape of a square with side lengths of 5 ft.

Therefore, the total lateral surface area of the building that will be painted = total lateral surface of the building - total area covered by the 60 windows on each face of the building

Surface area covered by 60 windows in the 4 lateral face of the building = (4)(60)(5²)

✅total lateral surface area of the building that will be painted = (2)(120)(80) + (2)(120)(50) - (4)(60)(5²)

6 0
2 years ago
Explain how to find the volume of any composite figure.
snow_tiger [21]

Answer:

Step-by-step explanation:

The first composite shape is a combination of a rectangular prism and a pyramid. To find the volume of the entire shape you find the volume of each individual shape and add them together. The second figure consists of a cylinder and a hemisphere.

8 0
3 years ago
Read 2 more answers
Factor 3x^2 minus 12x minus 36 Completely
stepan [7]
3(x-6)(x+2)
hope this helps
5 0
3 years ago
PLEASE HELP ON THIS, Find the area of the shape shown below.
aivan3 [116]
Because this shape has 2 right angles, we can confirm that it has one set of parallel sides and is a trapezoid. Therefore, use the formula for area of a trapezoid, .5(b1+b2)(h)
.5(1+6)(12)
.5(7)(12)
42 units^2
7 0
3 years ago
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Bovine deposits $7,000 into an investment that pays 4% interest compounded quarterly. if she leaves it in the account for 9 year
inysia [295]

Answer:

her balance will be $7,560 after 9 years i believe.

Step-by-step explanation:


4 0
3 years ago
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