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VladimirAG [237]
2 years ago
7

Please help me with this question!

Mathematics
1 answer:
Ber [7]2 years ago
8 0
I am un able to see the photo please re try so I can help
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Z + 4 = 11 <br><br><br>z= ?<br><br><br>what does z equal?<br><br>nevermind I know it
hichkok12 [17]

Answer: z = 7

Step-by-step explanation:

Step 1: Subtract 4 from both sides

z + 4 - 4 = 11 -4

z = 7

5 0
3 years ago
Read 2 more answers
PLEASE HELP, 30 points AND brainliest if I get an explanation :)
Nostrana [21]

Answer:

Please check the explanation.

Step-by-step explanation:

BLUE PENTAGON

The blue shape represents the Pentagon

The length of the side a = 7

As there are 5 sides.

Thus,

The Perimeter of the Blue Pentagon = P = 5a = 5(7) = 35

Using the formula to determine the area of the Pentagon

 A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}a^2\:\:\:\:\:\:\:\:\:\:\:\:\:

A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}\left(7\right)^2\:\:\:\:\:\:

A\approx 84.3\:\:\:

Thus,

The Area of the Blue Pentagon = A\approx 84.3\:\:\:

RED PENTAGON

The red shape represents the Pentagon

The length of the side a = 4

As there are 5 sides.

Thus,

The Perimeter of the Red Pentagon = P = 5a = 5(4) = 20

Using the formula to determine the area of the Pentagon

 A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}a^2\:\:\:\:\:\:\:\:\:\:\:\:\:

A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}\left(4\right)^2\:\:\:\:\:\:

\:A\approx 27.5

The Area of the Red Pentagon = \:A\approx 27.5

<u><em>Conclusion:</em></u>

The Perimeter of the Blue Pentagon =  35

The Perimeter of the Red Pentagon = 20

Thus, the<u><em> ratio of the perimeter</em></u> is: 35/20 = 7/4

The Area of the Blue Pentagon =  84.3 = 843/10

The Area of the Red Pentagon = 27.5 = 275/10

Thus, the<u><em> ratio of the Area</em></u> is:

 \frac{\frac{843}{10}}{\frac{275}{10}}=\frac{843}{275}

7 0
3 years ago
Solve the system of equations using the elimination method.<br> 2x - 3y = 50; 7x + 8y = -10
Klio2033 [76]

Answer:

x=10

y=-10

Step-by-step explanation:

multiply first row by 7

14x−21y=350

​7x+8y=−10

multiply second row by 2

14x−21y=350

​14x+16y=−20

subtract the first row by the second row

−37y=370

solve for y

y=−10

substitute y=-10

14x−21×−10=350

solve for x

x=10

and thats your answer

x=10

y=-10

​

3 0
2 years ago
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Combining like terms with negative coefficients <br> 2y-3xy+4y-5xy ?
Sunny_sXe [5.5K]

Answer:

6y - 8xy

Step-by-step explanation:

2y-3xy+4y-5xy

Combine like terms:

(2y+4y) + (-3xy -5xy)

6y - 8xy

7 0
3 years ago
The ratio of cats to dogs at the animal shelter is 3:4. There
svetlana [45]

Answer: 18 cats

Step-by-step explanation: If the ratio of dogs is 4 and there are 24 dogs then you divided 24 by 4. 24/4 is 6. Then you multiply 3 (the ratio of cats) by 6 which equals 18.

6 0
3 years ago
Read 2 more answers
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