2 years ago

Simplify the expression -2(5z -7)

Mathematics

1 answer:

zaharov [31]2 years ago

4 0

-10z+14 would be the simplified answer

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Quadrilateral DEFG has vertices at D(−2,2), E(−1,4), F(2,3), and G(−1,−2). Find the vertices of the quadrilateral after a dilati

dangina [55]

Answer: D(-7,7),E(-3.5,14),F(7,10.5), and G(-3.5, -7)

7 0

2 years ago

Dana has 4 hours to spend training for an upcoming race. She completes her training by running full speed the distance of the ra

Sedaia [141]

Answer:

2hrs 40 minutes

Step-by-step explanation:

The formula for distance is expressed as:

$d=st, s=speed, t=time$

#The time taken to run:

$d=st\\\\t=d/s\\\\t_r=d/8$

#The time taken to walk:

$d=st\\\\t=d/s\\\\t_w=d/2$

#Since the distances are the same:

$d_r=8t_r,d_w=2t_w\\\\8t_r=2t_w\\\\t_r+t_w=4->t_w=4-t_r\\\\\therefore8t_r=2(4-t_r)\\\\8t_r=8-2t_r\\\\t_r=1\frac{1}{3} \hrs\\\\t_w=4-1\frac{1}{3}=2\frac{2}{3}\ hrs$

Hence, Dana spends 2hrs 40 minutes walking back

8 0

2 years ago

Simplify the following: <br> 8h – 4g + 5g + 2h

Talja [164]

$8h - 4g + 5g + 2h \\ \\ (8h + 2h) -(4g - 5g) \\ \\ 10h - ( - g) \\ \\ 10h + g$

5 0

3 years ago

Lowest fraction using common term<br><br> 28/35

rjkz [21]

28/7=4
35/7=5
4/5
A: 4/5

3 0

3 years ago

Write 2.7 x 10^4 + 120 in scientific notation.

ryzh [129]

Hey there!

2.7 * 10^4 + 120

10^4

= 10 * 10 * 10 * 10

= 100 * 100

= 10,000

2.7 * 10,000 + 120

= 27,000 + 120

= 27,120

Therefore, your answer is. [10,000 * 2.712] because 10,000 * 2.712 is approximately 27,120

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

3 0

2 years ago