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3 years ago

Does anyone know how to do 16 a and b?!?!?! WILL GIVE BRAINLIEST!!! need this asap!!!!

Mathematics

2 answers:

valentina_108 [34]3 years ago

6 0

1 and 5 has the be it because of the average speed

gladu [14]3 years ago

5 0

Answer:

a - 25

b - 25 %

Step-by-step explanation:

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Alexa and Brent are each working on a 30-question assignment. Alexa completed 20% of the questions. Brent completed 30% of the q

Mandarinka [93]

So 20% of 30 is 6
30% * 30 is 9
Alexa completed 6 of 30 questions
Brent completed 9 of 30 questions

Brent completed 3 more questions than Alexa

Hope this helps :)

6 0

4 years ago

19z+12=20z–8<br> help i dont really understanddd!!!

alekssr [168]

Answer:

z = 20

Step-by-step explanation:

subtract 19z from 20z, and add 8 to 12. you will be left with 20 = 1z. Divide 1 by 20 and you will have Xz =20.

I hope this helps!

6 0

3 years ago

What is the solution to the equation? t-15=76

Ainat [17]

Answer:

t=91

Step-by-step explanation:

6 0

3 years ago

Factor this polynomial expression.<br> 8x +2x-15

Veronika [31]

5(2x-3) is the factored version

6 0

3 years ago

The cost of internet access at a café is a function of time. The costs for 8, 25, and 40 minutes are shown. Write an equation in

PolarNik [594]

Answer:

$y=0.17x+3$
The cost of surfing the web at the café for one hour: $\$13.2$

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

$y=mx+b$

Where "m" is the slope and "b" is the y-intercept.

Take two points and substitute them into the formula for calculate the slope (The formula is $m=\frac{y_2-y_1}{x_2-x_1}$ ).

Having these points:

$(8,4.36)$ and $(40,9.80)$

You can identify that:

$y_2=4.36\\y_1=9.80\\\\x_2=40\\x_1=8$

Then, the slope is:

$m=\frac{4.36-9.80}{40-8}=0.17$

Substitute the slope and the coordinates of any point on the line into the equation $y=mx+b$ and then solve for "b":

$4.36=0.17(8)+b\\\\4.36-1.36=b\\\\b=3$

Therefore, equation in Slope-Intercept form that represents the function is:

$y=0.17x+3$

Since 1 hour hour has 60 minutes, you need to substitute $x=60$ into the equation and then evaluate, in order to find the cost of surfing the web at the café for one hour. Then:

$y=0.17(60)+3\\\\y=13.2$

6 0

3 years ago