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jekas [21]
2 years ago
7

you want to buy three loaves of bread that cost $1.50 each and a jar of peanit butter that $4. a jar of jelly is $2.75, but you

don't need any jelly. you have $10 how much money you have left
Mathematics
2 answers:
Semenov [28]2 years ago
5 0

1.50x3= 4.5

4.5+4=8.5

10-8.5= m

        M=1.5

Elanso [62]2 years ago
3 0

1.50 x 3 = 4.50 (Bread)

4.00 pb

4.50+4.00= 8.50

10.00-8.50 = $1.50 left

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Y=4x<br> 3x-y=1 <br><br> I have to put this in (x,y)
kozerog [31]

Answer:

(x,y)= (-1,-4)

Step-by-step explanation:

y=4x

put this value of y in 3x-y=1

3x-4x=1

-x=1

x= -1

y=4(-1)

y= -4

So (x,y) ordered pair is (-1,-4)

4 0
3 years ago
The function is given by the formula f(x)=3x+2.
Naily [24]

Answer:

(a) f(7) = 23

(b) x = 13/3

Step-by-step explanation:

Step 1: Define

f(x) = 3x + 2

(a) f(7) is x = 7

(b) f(x) = 15

Step 2: Substitute and Evaluate

(a) f(7) = 3(7) + 2

f(7) = 21 + 2

f(7) = 23

(b) 15 = 3x + 2

13 = 3x

x = 13/3

3 0
3 years ago
What is the measure of
natka813 [3]

measure of what you have not finished the question

6 0
3 years ago
Read 2 more answers
The amount of bacteria in a petri dish increases at a rate proportional to the amount present. At time t=0, the amount of bacter
Lilit [14]

Answer:

Step-by-step explanation:

Formula to be used is N=N0e^(kt)

N0 - amount of bacteria at time 0, which is 10g

t=2, 30g

30 = 10*e^(k*2)

3 = e^(2k)

2k = ln3

k = 0.5ln3

At t=6:

N = 10*e^(0.5ln3*6)

N = 10e^(3ln3)

N = 10e^ln27

N = 10*27 =270

So the amount of bacteria at t=6 is 270

6 0
3 years ago
The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has under
Ann [662]

Answer:

t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50    

Step-by-step explanation:

Data given and notation  

\bar X=1.20 represent the sample mean given

\sigma = 0.14 represent the population standard deviation

n=49 sample size  

\mu_o =1.25 represent the value that we want to test

t would represent the statistic (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean for the gasoline prices is lower than 1.25, the system of hypothesis would be:  

Null hypothesis:\mu \geq 1.25  

Alternative hypothesis:\mu < 1.25  

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50    

5 0
3 years ago
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