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2 years ago

Solve below for 50 points pls!!

Mathematics

2 answers:

Bogdan [553]2 years ago

4 0

Answer:

Do these pairs of values (x and y) represent two quantities that are

proportional?

lozanna [386]2 years ago

3 0

Answer:

1.) The hypotenuse is h (the line between A and C). You could solve by adding the squares of 36 and 15, and then taking the square root of it.

2.) You could divide the corresponding sides by each other to solve for the proportion.

BTW h=36

Step-by-step explanation:

Hope this helps! Have a good day:)

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• Un automóvil parte de 0 m/s y aumenta su velocidad a 60 m/s en 15 segundos. ¿Cuál es su aceleración?

jeka57 [31]

Answer:

Aceleracion = 4 m/s²

Step-by-step explanation:

Dados los siguientes datos;

Velocidad inicial = 10 m/s

Velocidad final = 70 m/s

Tiempo, t = 12 segundos

Para encontrar la aceleración;

Aceleración se puede definir como la tasa de cambio de la velocidad de un objeto con respecto al tiempo.

Matemáticamente, la aceleración viene dada por la fórmula;

$Aceleracion = \frac{final \; velocidad - inicial \; velocidad}{tiempo}$

Sustituyendo en la fórmula, tenemos;

$Aceleracion = \frac{60 - 0}{15}$

$Aceleracion = \frac{60}{15}$

Aceleracion = 4 m/s²

3 0

3 years ago

pls help me giving brainless. find all angle measures. Assume each truss is symmetric. All of the roofs have a total top peak an

Molodets [167]

Answer:

I hate to do and take the points but so we just got to find the angles?

5 0

3 years ago

Read 2 more answers

HELP ME<br> screenshot down below !

Salsk061 [2.6K]

Answer: A

Step-by-step explanation:

Use pythagorean thm to solve for the hypotenuse. so $\sqrt{36+144}$ is 13.4

7 0

2 years ago

If a=mg-kv2/m,find,correct to the nearest whole number the value of v when a=2.8,m=12,g=9.8 and k=8/3

Cerrena [4.2K]

Answer:

v = 23

Step-by-step explanation:

Formatting the question gives;

a = mg - kv² / m

Make v subject of the formula as follows;

(i) Multiply both sides by m

ma = m²g - kv²

(ii) Collect like terms

kv² = m²g - ma

(iii) Divide through by k

v² = (m²g - ma) / k

(iv) Take the square root of both sides

v = √ [(m²g - ma) / k] --------------(ii)

From the question:

a = 2.8

m = 12

g = 9.8

k = 8/3

Substitute these values into equation (i) as follows;

v = √ [(12²(9.8) - 12(2.8)) / (8/3)]

v = √ [(1411.2 - 33.6) / (8/3)]

v = √ [1377.6 / (8/3)]

v = √ [1377.6 x (3/8)]

v = √ [1377.6 x 3 / 8)]

v = √ [516.6]

v = 22.73

v = 23 [to the nearest whole number]

Therefore v = 23 to the nearest whole number

3 0

3 years ago

Answer ASAP, Will give brainliest

erastova [34]

Answer:

Step-by-step explanation:

1) ABCD is a trapezium. AB ║ CD

∠ADC + ∠DAB = 180° { Co interior angles}

110° + ∠DAB = 180

∠DAB = 180 -110

∠DAB = 70°

2) Sum of all angles of trapezium = 360°

∠A + ∠B + ∠DCB + ∠D = 360

70° + 50° + ∠DCB + 110° = 360

230 + ∠DCB = 360

∠DCB = 360 - 230

∠DCB = 130°

3) For finding the height, use Pythagorean theorem

height² + base² = hypotenuse²

height² + 6² = 10²

height² + 36 =100

height² = 100 - 36

height² = 64

height = √64

height = 8 m

4) a = AB = x m

b = 9 m

h = height = 8 m

Area of trapezium = 120 m²

$\frac{(a+b)*h}{2}\\\\$ = 120

$\frac{(x+9)*8}{2} =120\\\\\\(x +9)*4 = 120$

x + 9 = 120/4

x + 9 = 30

x = 30 - 9

x = 21 m

AB = 21m

7 0

3 years ago