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Rzqust [24]
3 years ago
5

Help me all please!!

Mathematics
2 answers:
Licemer1 [7]3 years ago
8 0
Well every pizza cost 9.50. So to see the cost for 2 pizzas you can do 2 * 9.50 and for 3 pizzas would be 3 * 9.50 and for 4 is 4 * 9.50 and this goes on forever. notice how the number of pizzas is the only thing that changes. So so we could substitute p for the number of pizzas and say
p pizzas cost p * 9.50 or 9.50p

To have it delivered there is a flat rate of 4.50. this can be added onto the price of p pizzas and we get
cost is 9.50p + 4.50 or
c = 9.50p + 4.50

2. h + 7 =15. in this equation we want to get the h by itself to its value. well to get the h by itself I have to get rid of the + 7. To to make + 7 = 0 I would have to put a - 7. But to put a -7 on one side of an equation i have to put it on other side like this:
h + 7 - 7 = 15 - 7
h + 0 = 8
h = 8

3. same as above but addition
m - 10 + 10 = 24 + 10
m = 34

4. same but division
6 * t / 6 = 96 / 6
t = 16

5. same but multiplication
p/7 *7 =3 * 7
p = 21
Harlamova29_29 [7]3 years ago
7 0
No matter how many pizzas he orders (P) he will be charged 4.50. then each pizza is worth 9.50 so you multiply that by how many he orders (5)
c=4.5+9.5p 
c=4.5+9.5(5)
c=$52

for these problems you do the opposite of what is shown
1. h+7=15, subtract 7 from each side. h=8
2. m-10=24, add 10 to each side m=34
3.6t=96, divide both sides by 6 t=16
4. multiply both sides by 7, p=21. 

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MakcuM [25]

Answer:

22.4 hours

Step-by-step explanation:

The population of bacteria is modelled by the equation:

P=P_0e^{rt}

From the the question, the initial population of bacteria is 720.

So after 26 hours, we have:

P=2P_0

This implies that:

2P_0=P_0e^{26r}

2=e^{26r}

26r =  ln(2)

r =  \frac{ ln(2) }{26}

r = 0.0267

We want to find how long it will take for there to be 1310 bacteria present.

1310=720e^{0.0267t}

\frac{1310}{720}  =  {e}^{0.0267t}

\ln(\frac{1310}{720})  = {0.0267t}

0.59853= {0.0267t}  \\ t =  \frac{0.59853}{0.0267}

t = 22.417

To the nearest tenth , it will take 22.4 hours

6 0
3 years ago
X: -3x + 14 = 4x -7
Luda [366]
-3x+14=4x-7 = x=3

The answer is x=3
7 0
3 years ago
Read 2 more answers
Solve : 2 (m + 1) = 3(m - 1)
siniylev [52]

Step-by-step explanation:

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2 years ago
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PLEASE HELP WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!
STatiana [176]

Considering High School level question, answer can be written as:


A system of 2 linear equations is [two] dimensional. It is a graph of [two] lines. The solutions can be [unique] solution if the graph intersects. [No] solution if the lines are parallel - meaning they have the same slope, or [Infinitely many] solutions if they are the same line.


Explanation:

when two lines are drawn on a two-dimensional plane then there are only three possible cases:

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Case2: lines are parallel but don't touch each other

In that case there will be no point which lies on both lines so No solution.


Case3: lines are overlapping.

In that case all the points lies on both lines so infinitely many solutions.


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We use the t distribution for the statistical inference of the population mean when the underlying population standard deviation
Digiron [165]

Answer:

Step-by-step explanation:

Since population std deviation is not  known, we use t critical value for testing of hypothesis.

a) 90% conf level when n =28

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df =14 and t critical = 1.761

d) 95% and n =15

df =14:   t critical = 2.145

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