Simplify -(-2a + 13) + (-9a - 2) - (-7a - 3). 12 -12 14a - 12 14a

olchik [2.2K]

"DEF" and "FED" are the two angles among the choices given in the question that has a vertex at E. The correct options among all the options that are given in the question are option "A" and option "B". I hope that this is the answer that you were looking for and it has come to your desired help.

6 0

3 years ago

Read 2 more answers

A car travels for 4(t+3) hours at a constant speed of 10(t+3) km/h. If the total distance travelled by the car is 810 km, find t

IceJOKER [234]

Step-by-step explanation:

$\because \: time \times speed = distance \\ \therefore \: 4(t + 3) \times 10(t + 3) = 810 \\ \therefore \: 4(t + 3)^{2} = 81 \\ \therefore \: \{2(t + 3) \}^{2} = {9}^{2} \\ \therefore \: \{2(t + 3) \} = {9} \\ \therefore \: t + 3 = \frac{9}{2} \\ \therefore \: t = \frac{9}{2} - 3 \\ \therefore \: t = \frac{9 - 6}{2} \\ \therefore \: t = \frac{3}{2} \\ \therefore \: t = 1.5 \: hrs \\$

$\because \: time \times speed = distance \\ \therefore \: 4(t + 3) \times 10(t + 3) = 810 \\ \therefore \: 4(t + 3)^{2} = 81 \\ \therefore \: \{2(t + 3) \}^{2} = {9}^{2} \\ \therefore \: \{2(t + 3) \} = {9} \\ \therefore \: t + 3 = \frac{9}{2} \\ \therefore \: t = \frac{9}{2} - 3 \\ \therefore \: t = \frac{9 - 6}{2} \\ \therefore \: t = \frac{3}{2} \\ \therefore \: t = 1.5 \: hrs \\ speed \: of \: car = 10(t + 3) \\ \hspace{60 pt} = 10(1.5 + 3) \\ \hspace{60 pt}= 10 \times 4.5 \\ \red{ \boxed{ \bold{ \therefore \: speed \: of \: car = 45 \:km/ h}}} \\$

3 0

3 years ago

Mary needs 45 craft sticks to build a model for her science project. If the craft sticks cost 10 cents each, how much will 45 cr

Snowcat [4.5K]

Answer:

the answer is B

Step-by-step explanation:

3 0

3 years ago

Which equation has no solution?

Natasha2012 [34]

Answer:

equation 1 has no solution

Step-by-step explanation:

when you compare each of the equations, all the equations gives a correct answer with the exception of equation 1

8 0

1 year ago

X-1=-5-x if you know please

melisa1 [442]

Answer:

X will be -2

Step-by-step explanation:

Divide each side by factors that don't contain the variable

6 0

2 years ago

Simplify -(-2a + 13) + (-9a - 2) - (-7a - 3). 12 -12 14a - 12 14a - (-12)