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PSYCHO15rus [73]
3 years ago
9

Jim bought d donuts at $0.89 each. Write an expression for the total cost of donuts

Mathematics
1 answer:
Oksana_A [137]3 years ago
5 0

Answer:

.89d=c

d is a variable for donuts

c is the total cost


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The average speed of a train that travels x in 3/4 hour
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Ans: (x/(3/4)) mph = (4x/3)mph = (4/3)x mph
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Floor tile costs $11 per square yard. How much will it cost to tile a bathroom that is 90 square feet?
Usimov [2.4K]
99 Dollars one square foot = 9 square yards
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3 years ago
A salesperson is paid a flat rate plus a fixed percentage of her sales. Last month, she sold $16,000 worth of goods and was paid
Feliz [49]

Answer:

<em>She will be paid $1,350</em>

Step-by-step explanation:

<u>Linear Modeling</u>

Some events can be modeled as linear functions. If we are in a situation where a linear model is suitable, then we need two sample points to make the model and predict unknown behaviors.

The linear function can be expressed in the slope-intercept format:

y=mx+b, where m and b are constants.

The payments for a salesperson will be linearly modeled. There are two known points: When the sales were $16,000, the payment was $1,600. This makes the point (16,000;1,600).

We also know when the sales were $12,000, the payment was $1,400. The point is (12,000;1,400)

Let's use the points to find the values of m and b.

Using (16,000;1,600):

1,600=m*16,000+b

Using (12,000;1,400):

1,400=m*12,000+b

Subtracting both equations:

200=16,000m-12,000m

200=4,000m

Solving:

m=200/4,000=0.05

Using the first equation and the value of m:

1,600=0.05*16,000+b

1,600=800+b

Solving:

b=800

The equation is now complete:

y=0.05x+800

She sold $11,000 this month, so the payment is:

y=0.05\cdot 11,000+800

Y=550+800=1,350

She will be paid $1,350

3 0
3 years ago
A store had 100 t-shirts. Each month, 30% of the t-shirts were sold and 25 new t-shirts arrived in shipments. Which recursive fu
Mashutka [201]

Answer:

f(a_n) = 0.7f(a_{n-1}) + 25

Step-by-step explanation:

The number of t-shirts a in month n is 70% of the number of t-shirts in month n-1 plus 25 because they always sell 30% of the t-shirts and get 25 t-shirts in shipments. f(0)=100 can be included as an after-thought.

5 0
2 years ago
Read 2 more answers
How can you solve an equation with the variable on both sides plz help
Sergeeva-Olga [200]
I don't know if this is the right one but i hope this helps. this is how i learned it. 
step 1=get variables on one side oof the equal sign by using inverse operation (add or subtract smaller variable) 
step 2= get constants away from variable to the other side of the equal sign by using inverse operations (add or subtract constant) 
step 3: isolate the variable using inverse operation (multiply or divide) 
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3 years ago
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