All categories

3 years ago

Andrew is showing his work in simplifying (−5.7 + 2.2) − 1.1.

2 answers:

6 0

Answer: In step 1, Andrew used the commutative property

Explanation:
In step 1 he used commutative, which is a + b = b + a
(- 5.7 + 2.2) = 2.2 + (- 5.7)

Step 2, he used associative property, not the distributive.

Step 3, he just added5.7 + 1.1 = 6.8

Step 4, he distributed the negative sign:
- (6.8) = - 6.8

valkas [14]3 years ago

4 0

In step 2, Andrew used the distributive property

Thus is because a -1 was taken out of both -5.7 and -1.1

You might be interested in

5. 2x + 5 - 7x = 15 6. X= Help me

Andreyy89

Answer:

-2

Step-by-step explanation:

2x+5-7x=15

Combine like terms

-5x+5=15

Subtract 5 from both sides

-5x=10

Divide -5 from both sides

x=-2

4 0

4 years ago

Read 2 more answers

Work out the height of the triangle with base, b = 2.4mm and area, A = 34.68mm squared

nikdorinn [45]

2.4*x/2=34.68
2.4*x=69.36
x=28.9
(x is the height)

7 0

3 years ago

Geometry Special Quadrilaterals show work please

Charra [1.4K]

Answer:

a = 16

w = 125

x = 120

y = 55

Step-by-step explanation:

FINDING 'a'

31 = a + 46 / 2

62 = a + 46

16 = a

FINDING 'w'

* This section looks Non-Isosceles trapezoid so I will be following the rule according it

w + 55 = 180

w = 125

FINDING 'y'

y = 55

- Because of corresponding angles

FINDING 'x'

* In this case it looks like we are still dealing w/ an non-isosceles trapezoid.

x + 60 = 180

x = 120

Hope this helped ^^

(Please inform me of any mistakes or misunderstandings!)

6 0

3 years ago

Two trains travel at right angles to each other after leaving the same train station at the same time. Two hours later they are

hjlf

Answer:1547.9 miles per hour

Step-by-step explanation:

Let the two trains leave in x direction and y direction

Velocity of train in x direction be v

therefore velocity of train in Y direction is v+29

because one train is 29 miles per hour slower than other.

Distance travel by train in x direction is(x) v(2)

Distance travel by train in y direction is(y) 2(v+29)

distance between them after 2 hours is 4420 miles

Now using pythagoras theorem

$x^2+y^2=\left ( 4420\right )^2$

$\left ( 2v\right )^2+\left ( 2\left ( v+29\right )\right )^2=\left ( 4420\right )$

on solving

$2v^2+58v-4881699=0$

v= $\frac{-58\pm \sqrt{\left ( 58 \right )^2+4\cdot 2\cdot4881699}}{2\cdot 2}$

v=1547.889 miles per hour

7 0

3 years ago

In 300 people 60% liked to visit Pokhara, 35% liked chitwan and 20%

ryzh [129]

<h2>Answer:</h2><h2>45</h2>

Please see the attached picture for full solution

hope it helps....

Good luck on your assignment.......

3 0

3 years ago