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zavuch27 [327]
2 years ago
8

What is the average of the two bases in the following trapezoid in feet?

Mathematics
2 answers:
Alex2 years ago
8 0
Since 7 yd is 21 ft you will have to
add 15 ft to 21 ft (36 ft)
and then divide by two 
your answer is 18 ft
Tom [10]2 years ago
5 0

Answer:

The answer is 18 ft

Step-by-step explanation:

Hope this helps!

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Una lancha que viaja a 10 m/s pasa por debajo de un puente 3 segundos después que ha pasado un bote que viaja a 7 m/s, ¿después
ExtremeBDS [4]

Answer:

La lancha y el bote se encontrarán a 70 metros de distancia del puente.

Step-by-step explanation:

Sea el punto debajo del puente el punto de referencia y que ambas lanchas se desplazan a velocidad a continuación, las ecuaciones cinemáticas para cada embarcación son presentadas a continuación:

Bote a 7 metros por segundo

x_{A} = x_{o}+v_{A}\cdot t (Ec. 1)

Lancha a 10 metros por segundo

x_{B} = x_{o}+v_{B}\cdot (t-3\,s) (Ec. 2)

Donde:

x_{o} - Posición debajo del puente, medido en metros.

x_{A}, x_{B} - Posición final de cada embarcación, medido en metros.

v_{A}, v_{B} - Velocidad de cada embarcación, medida en metros por segundo.

t - Tiempo, medido en segundos.

Para determinar la posición en la que ambas embarcaciones se encuentran, se debe determinar el instante en que ocurre a partir de la siguiente condición: x_{A} = x_{B}

Igualando (Ec. 1) y (Ec. 2) se tiene que:

v_{A}\cdot t = v_{B}\cdot (t-3\,s)

Ahora despejamos el tiempo:

3\cdot v_{B} = (v_{B}-v_{A})\cdot t

t = \frac{3\cdot v_{B}}{v_{B}-v_{A}}

Si sabemos que v_{B} = 10\,\frac{m}{s} y v_{A} = 7\,\frac{m}{s}, entonces:

t = \frac{3\cdot \left(10\,\frac{m}{s} \right)}{10\,\frac{m}{s}-7\,\frac{m}{s}}

t = 10\,s

Ahora, la posición de encuentro es: (x_{o} = 0\,m, v_{A} = 7\,\frac{m}{s} y t = 10\,s)

x_{A} = 0\,m + \left(7\,\frac{m}{s} \right)\cdot (10\,s)

x_{A} = 70\,m

La lancha y el bote se encontrarán a 70 metros de distancia del puente.

6 0
3 years ago
MUST SHOW WORK. <br> please do this ASAP!<br> This is about numerical expressions!
lara31 [8.8K]

\huge\text{Hey there!}

\mathsf{2(4 - 1)^2 - 3 + 2(5)}

\mathsf{4 - 1 = \bf 3}

\mathsf{= 2(3^2) - 3 + 2(5)}

\mathsf{3^2}\\\mathsf{= 3\times3}\\\mathsf{= \bf 9}

\mathsf{= 2(9) - 3 + 2(5)}

\mathsf{2(9)}\\\mathsf{= \bf 18}

\mathsf{= 18 - 3 + 2(5)}

\mathsf{18 - 3}\\\mathsf{= \bf 15}

\mathsf{= 15 + 2(5)}

\mathsf{2(5)}\\\mathsf{= \bf 10}

\mathsf{= 15 + 10}\\\mathsf{= \bf 25}

\boxed{\boxed{\huge\text{Therefore, your ANSWER is: \textsf{25}}}}\huge\checkmark

\huge\text{Good luck on your assignment \& enjoy your day! }

~\frak{Amphitrite1040:)}

4 0
3 years ago
Read 2 more answers
A woman is floating in a boat that is 175 feet from the base of a cliff. The cliff is 250 feet tall. What is the angle of elevat
yulyashka [42]

Answer:

75° I guess am I wrong or right

7 0
3 years ago
What's the volume of a cone with the base of 14ft?
Nostrana [21]

Answer:

volume =  \frac{1}{3} \pi {r}^{2} h \\ but \: h = 7 \tan(50 \degree)  \\ h = 8.34 \: ft \\ volume =  \frac{1}{3}  \times 3.146 \times  {(7)}^{2}  \times 8.34 \\ volume = 428.55 \: cubic \: ft

7 0
3 years ago
You randomly select one card from a 52-card deck. Find the probability of selecting a two or a five.
Vladimir79 [104]

Answer:

2/13

Step-by-step explanation:

there are 4 5s and 4 2s so

8/52

simplified is 2/13

3 0
3 years ago
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