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brilliants [131]
3 years ago
6

PLEASE help me

Mathematics
1 answer:
Kay [80]3 years ago
7 0

Answer:

D) 2(4a+7)

Step-by-step explanation:

when one divides both the number by 2 you get 4a+7 so the answer is 2(4a+7)

You might be interested in
How to make a 70% into a fraction
Yuliya22 [10]

Answer:

\frac{7}{10}

Step-by-step explanation:

A percent is out of 100.

70\% = \frac{70}{100}=\frac{70/10}{100/10}  =\boxed{\frac{7}{10}}

I hope this helps.

4 0
3 years ago
Z3=-64 help please I will give brainliest
snow_lady [41]

Answer:

-4

Step-by-step explanation:

<h2><u>An exponent is multiplying a number by itself as many times as the exponent says so.</u></h2><h2><u /></h2><h2><u>So we need to find a number that times itself 3 times.</u></h2>

-4 fits this.

-4 x -4 x -4

==> -64

z = -4

6 0
3 years ago
Read 2 more answers
A fisherman traveled in a boat from point N upstream. After having traveled 6 km, he stopped rowing and 2 hour 40 min after firs
Nat2105 [25]

Answer:

The speed of the river's current is 4.5 km/hr.

Step-by-step explanation:

Given : A fisherman traveled in a boat from point N upstream.

After having traveled 6 km, he stopped rowing and 2 hour 40 min after first leaving N, he was brought back to N by the current.

Knowing that the speed of the boat in still water is 9 km/hour

To find : The speed of the river’s current.

Solution :

Let the speed of current  = x km/h

Speed of boat = 9 km/h

Thus, the speed in upstream = (9 - x) km/h

Also, the speed in downstream = x km/h (because the boat is stationary in downstream)

Total distance = 6 km ( from N to the point he reached )

Total time = 2 hours 40 minutes

\text{2 hours 40 minutes}=2\frac{40}{60}=2 \frac{2}{3} \\\\\text{2 hours 40 minutes}=\frac{8}{3} \text{ hours}

We know, \text{Time} = \frac{\text{Distance}}{\text{Speed}}

According to the question,

\frac{6}{9-x}+\frac{6}{x}=\frac{8}{3}

Taking LCM and 6 common

6[\frac{x+9-x}{(9-x)x}]=\frac{8}{3}

Take 6 to another side,

\frac{9}{9x-x^2}=\frac{8}{3\times 6}

Cross multiply,

9\times 18=8\times(9x-x^2)

162=72x-8x^2

Taking 4 common and cancel out

4x^2-36x+81=0

Solve quadratic equation by middle term split,

4x^2-18x-18x+81=0

2x(2x-9)-9(2x-9)=0

(2x-9)(2x-9)=0

\Rightarrow 2x-9=0

\Rightarrow x=\frac{9}{2}=4.5

Therefore, The speed of the river's current is 4.5 km/hr.

6 0
3 years ago
I need help fast plz<br>​
Aleonysh [2.5K]

Answer:

what do you need help with

8 0
3 years ago
ILL GIVE YOU BRAINLIST !!!! What is the slope of this table?
VLD [36.1K]

Answer: Slope is m = 2/3

Step-by-step explanation:

-You have exactly four points on a table:

(3,2) (6,4) (9,6) (12,8)

-Use the slope formula and use any two points from those four points in order to find the slope:

m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}

-The two points I use are  (3, 2)  and (6,4 ) for the equation:

m = \frac{4 - 2}{6-3}

m= \frac{2}{3}

So, the slope of the table is \frac{2}{3}.

8 0
3 years ago
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