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LekaFEV [45]
3 years ago
5

What is the value of the expression below when x = 5 and y = 2?X + 6y​

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
7 0
Instead of X put 5 and instead of y put 2
5+6(2)
5+12= 17
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Ruby is decorating for a party and needs 120 meters of ribbon. At the party supply store, the ribbon is sold in rolls. Each roll
Rufina [12.5K]

Answer:

She will need to purchase 16 rolls of ribbon

Step-by-step explanation:

Step 1: Express the total length of ribbon

Use the expression below;

T=R×N

where;

T=total length of ribbon Ruby has

R=length per roll

N=number of rolls

In our case;

T=120 meters, but since 1 meter=3.28084 feet

T=(120×3.28084)=393.7008 feet

R=25 feet

N=n

replacing;

393.7008 =25×n

n=393.7008/25

n=15.748 rounded up=16

She will need to purchase 16 rolls of ribbon

6 0
3 years ago
The number of board feet in a 16 foot long tree is approximated by the model F(d) = 0.77d^2 -- 1.32d -- 9.31 where F is the numb
Lubov Fominskaja [6]

we are given

F(d)=0.77d^2-1.32d-9.31

where

F is the number of board feet

d is the diameter (in inches) of the log

Since, we have to minimize F

so, firstly we will find it's derivative

F'(d)=0.77\times 2d-1.32\times 1-0

F'(d)=1.54d-1.32

now, we can set it to 0

and then we can solve for d

F'(d)=1.54d-1.32=0

1.54d-1.32=0

so, we get diameter as

d=\frac{6}{7}inch..............Answer

6 0
3 years ago
Can someone do the last question for me please, with steps, i don’t have much points left :(
Inessa [10]

Answer: Wait a minute, Is the answer is 144 cubic centimetres?

Step-by-step explanation: So this is the given formula volumebox = width x length x height. Measure any two sides (length, width or height) of an object or surface in order to get a two-dimensional measurement, then multiply the width, length, and the height: 12*6*2=144 cm^3.

4 0
2 years ago
The price of a car has been reduced from $15,500 to $10,695. What is the percentage decrease of the price of the car?
IceJOKER [234]
(10,695/15,500 -1) * 100% = -31%

The price was decreased 31%.
5 0
3 years ago
Robin purchased 3 1\2 ounces of whole wheat cereal for $1.40. What is the cost per ounce?
Natalka [10]
The answer is 40 cents
8 0
3 years ago
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