When we use letters to represent unknown numbers, we call the equation

Answers

Answer 1

Answer: A value the replace a number that you can't see

Answer 2

Answer: It's called variables, that's what we see

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A line with a slope of -1/2 passes thru the point (-4,3)...Which equation represents this line?
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Calculate 25.13 -(4.6²-3x5)

Answers

18.97 is the answer i believe

Lydia and Adam are buildng a display of soup cans at the market where they work. the display is in the form of a square pyramid, with a base of 81 cans. They will continue making smaller layers until there is one can at the top. Adam is going to the stockroom to get the can they will need. a. How many layers will be in the display?

b. How many canse will Lydia and Adam use total?

Answers

Answer:

(a). 9 layers

(b). 285

Step-by-step explanation:

In the question,

The Square Pyramid is needed to be made from the cans.

The base of the pyramid has = 81 cans

So,

Side of the Square = s

So,

$s^(2)=81\ns = 9$

Therefore, the number of cans on one side of the square base = 9 cans

So,

The number of cans will be reducing by 1 in each layer upto the point we are left with only 1 can in the top.

So,

1st layer = 9 cans

2nd layer = 8 cans

3rd layer = 7 cans

4th layer = 6 cans

5th layer = 5 cans

6th layer = 4 cans

7th layer = 3 cans

8th layer = 2 cans

9th layer = 1 can

Number of layers are = 9

(b).

Total number of cans used by Lydia and Adam will be,

Sum of number of cans in all the layers.

$Number\,of\,cans=9^(2)+8^(2)+7^(2)+6^(2)+5^(2)+4^(2)+3^(2)+2^(2)+1^(2)\nNumber\,of\,cans=81+64+49+36+25+16+9+4+1\nNumber\,of\,cans=285$

Therefore, the number of cans = 285

There are 25 coins inside a container. Some of the coins are nickels, and the rest are quarters. The value of the coins is $4.05. Let n represent the number of nickels and q be for the number of quarters. What equation represents this problem?

Answers

Answer:

n + q = 25
0.05n + 0.25q = 4.05

Step-by-step explanation:

Two equations are required to represent this problem as posed.

1. An equation for the number of coins:

n + q = 25

2. An equation for the value of the coins:

0.05n + 0.25q = 4.05

Find the 8th term of the geometric sequence 7, 28. 112, ... HELP PLSSSS

Answers

114,688
the sequence was multiplying by 4 each time so all u needed to do was multiply each answer by four starting from 7x4
7×4 = 28
28×4 = 112
112×4 = 448
448×4 = 1 792
1792×4 = 7168
7168×4 = 28,672
28,672×4 =114,688

What is the value of the expression |5x+12| when x=5

Answers

Answer:

|5x+12| when x=5

I5*5=12I

I37I

Step-by-step explanation:

Answer:

Step-by-step explanation:

X=5

5x=(5×5)=25

25+12=37

Consider each equation and solution. Which solution is NOT correct?

Answers

Answer:

D, or the last answer

Step-by-step explanation:

First, plugin the value of y into the equation, resulting in 12 - 2(-2) = 8.

Second, Simplify as much as you can on the left hand side of the equation, resulting in 12 - (-4), and because of the double negative rule, those two negatives become a plus. 16

Lastly, see if the two sides are equal or not equal. 16 is NOT equal to 8. That means D is your answer.

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Cost of a dozen pens is ₹ 180 and cost of 8 ball pens is ₹ 56. Find the ratio of the cost of a pen to the cost of a ball pen. [1 ½ m]

2. In an industrial training program, students have been averaging about 64 points on a standardized test. The lecture system was replaced by teaching machines with a lab instructor. There was some doubt as to whether the scores would decrease, increase, or stay the same. A sample of n = 60 students using the teaching machines was tested, resulting in a mean of 68 and a standard deviation of 12. Perform a hypothesis test to see if scores would decrease, increase, or stay the same. Use α = 0.05. Be sure to:1. State your hypotheses. 2. Find the value of the Test Statistic. 3. Find the p-value 4. State your decision (Reject or not) 5. State your conclusion.

I’m really struggling, someone please help!