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vivado [14]
3 years ago
12

Helppp me Please!!!!! :)

Mathematics
1 answer:
irina [24]3 years ago
7 0

Answer:

x = 30 \\ y = 10

Step-by-step explanation:

8x + 6y = 300 \\ x + y = 40 \\ 6x + 6y = 240 \\ 2x = 60   \\ =  > x = 30 \\ y = 10

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What is the area of this composite figure?
Mkey [24]

We have two congruent trapezoids.

The formula of an area of a trapezoid:

A=\dfrac{base_1+base_2}{2}\cdot\ height

We have:

base_1=210\ mm\\\\base_2=150\ mm\\\\height=55\ mm

Substitute:

A=\dfrac{210+150}{2}\cdot55=\dfrac{360}{2}\cdot55=180\cdot55=9,900\ mm^2

Answer:

2A=2\cdot9,900\ mm^2=19,800\ mm^2

6 0
3 years ago
The sum of two numbers is 53 . The larger number is 9 more than the smaller number. What are the numbers?
Illusion [34]

x + y = 53

x -y = 9  Adding both equations

2x = 62

x = 31 y = 22


6 0
3 years ago
Express 3/5 as a decimal
lana66690 [7]

Answer:0.60

Step-by-step explanation:

Multiply the denominator (5) and the numerator (3) by 20. Both sides multiplied equals 60 as the numerator and 100 as the denominator. After the conversions to a decimal, your answer should be 0.60 since 60/100=0.60.

4 0
3 years ago
What is the answer? Please help!
gavmur [86]

Answer:

It is the second answer!

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Brook makes this conjecture: Because the angles are equal, the proportion of area of each sector relative to the area of the giv
AnnZ [28]

Answer:

The Brooks conjecture is true as the proportion of the area of a sector to the area of a circle is only dependent on the angle.

Step-by-step explanation:

The area of a sector for a radius r and an angle θ is given as

\Delta Sector=\dfrac{1}{2}r^2\theta

Whereas the area of a circle for a radius r is given as

\Delta Circle=\pi r^2

Now the ratio is given as

\dfrac{\Delta Sector}{\Delta Circle}=\dfrac{\dfrac{1}{2}r^2\theta}{\pi r^2}

Here as r is the radius of the circle and it is the same therefore the above ratio is simplified to

\dfrac{\Delta Sector}{\Delta Circle}=\dfrac{\theta}{2\pi }

Here as π is constant the only variable here is θ. Thus according to Brooks conjecture when the angles are equal, the proportion of area of each sector relative to the area of the given circle is also equal is true.

6 0
3 years ago
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