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2 years ago

Select the number property that will justify the step in the following expression.

Mathematics

2 answers:

Lostsunrise [7]2 years ago

5 0

Associative property of multiplication which states :
(a * b) * c = a * (b * c)

IRISSAK [1]2 years ago

3 0

2(5 • 17) = (2 • 5) 17

It is Associative Multiplication

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Translate into a variable expression. fifteen more than one-half of the square of z

stellarik [79]

Answer:

15 +(1/2)X z²

this is your expression plz brainlist me and follow me

5 0

3 years ago

The ratio of pens to pencils in Mrs. Bosworth's desk is 4:1. What does this mean?

anzhelika [568]

If there are 4 pens there will be 1 pencil, if there is 1 pencil there will be 4 pens
If the ratio is factored to a number, let's say 3, then there will be 12 pens for every 3 pencils

4 0

3 years ago

Julio started biking to the park traveling 8 mph, after some time the bike got a flat so Julio walked the rest of the way, trave

USPshnik [31]

Answer:

Julio travel 3 hours by biking and 4 hours by walking.

Step-by-step explanation:

Given:

Julio started biking to the park traveling 8 mph, after some time the bike got a flat so Julio walked the rest of the way, traveling 7 mph.

If the total trip to the park took 7 hours and it was 52 miles away.

Now, to find the time Julio travel at each speed.

The speed travelled by the bike = 8 mph.

The speed travelled by the walking = 7 mph.

Let the time Julio travel with bike be $x.$

And the time Julio travel by walking be $y.$

As, given Julio started biking to the park traveling, after some time the bike got a flat so Julio walked the rest of the way,

Thus, the total time taken:

$x+y=7$

$y=7-x\ \ \ .......(1)$

So, the distance travelled by bike:

Speed × time

$8\times x=8x$

And, the distance travelled by walking:

Speed × time

$7\times y=7y$

Now, the total distance travelled by Julio:

$8x+7y=52$

Substituting the value of $x$ from equation (1) we get:

$8x+7(7-x)=52$

$8x+49-7x=52\\\\x+49=52$

Subtracting both sides by 49 we get:

$x=3.$

The time Julio travelled with bike = 3 hours.

Now, to get the time Julio travelled by walking by substituting the value of $x$ :

$y=7-x\\\\y=7-3\\\\y=4\ hours.$

The time Julio travelled by walking = 4 hours.

Therefore, Julio travel 3 hours by biking and 4 hours by walking.

7 0

3 years ago

X-intercept(s) y-intercept Vertex Minimum or Maximum? Min/Max value

garik1379 [7]

Answer:

2 ,-1 -2

Step-by-step explanation:

3 0

3 years ago

The circulation of a newsletter decreased from 6000 to 3710. Find the percent of decrease in circulation to the nearest percent.

lbvjy [14]

Percent change = ((new value) - (old value))/(old value) × 100%
= (3710 - 6000)/6000 × 100%
= -38.16%

The decrease in circulation is about 38%.

5 0

2 years ago