MATHEMATICS HIGH SCHOOL

Is 2+2 an equation or an expression and why?

Answers

Answer 1

Answer:

Answer:

its an equation

Step-by-step explanation:

an expression is has variables

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1 7/3 in simplest form

solve by substitution ( show steps)

y=3x+2

3x-y=2

Answers

$\left\{\begin{array}{ccc}y=3x+2\n3x-y=2\end{array}\right\n\nsubstitute\n\n3x-(3x+2)=2\n3x-3x-2=2\n-2=2-FALSE\n\nAnswer:No\ solution$

$y=3x+2\n 3x-y=2\n\n 3x-(3x+2)=2\n 3x-3x-2=2\n -2=2\n x\in\emptyset \Rightarrow y\in\emptyset$

Twenty-one is 25% of

Answers

Answer:

Twenty-one is 25% of 84 .

Step-by-step explanation:

Formula

$Percentage = (Part\ value* 100)/(Total\ value)$

As given

Part value = 21

Percentage = 25%

Put all the values in the formula

$25= (21* 100)/(Total\ value)$

$25= (2100)/(Total\ value)$

$Total\ value = (2100)/(25)$

Total value = 84

Therefore Twenty-one is 25% of 84 .

The expression is Twenty-one is 25% of 84

How to determine the expression as a percentage

From the question, we have the following parameters that can be used in our computation:

Twenty-one is 25% of

Represent the percentage with x

So, we have

Twenty-one is 25% of x

Mathematically, we have

21 = 25% * x

Rewrite as

25% * x = 21

So, we have

x = 21/25%

Express the percentage as decimal

x = 21/0.25

Evaluate the expression

x = 84

Hence, the number in the percentage is 84

Answers

Answer:

x(x2 + 5) - 6(x2 + 5)

Step-by-step explanation:

hope it help! :D

Answer:

Step-by-step explanation:

took test on edg

Which measurement is the best estimate for the mass of a refrigerator?A : 90 mg

B : 90 g

C : 90 kg

Answers

C 90 kg A and B are to small

Answer:

90 Kg

Step-by-step explanation:

because the b and a are to small to be the estimate mass of a refrigerator.

Please I really need help with this question it’s due tomorrow!!

Answers

Answer:

THERE

Step-by-step explanation:

a) To determine how far each ostrich ran, we need to calculate the area under the velocity-time graph for each ostrich. Since the graph represents velocity, the area under the graph represents the distance traveled.

For Ostrich Bert:

The area under the graph can be divided into two sections: a triangle and a rectangle. The triangle's base is 3 seconds and its height is 18 m/s, so its area is (1/2) * 3 * 18 = 27 m. The rectangle has a base of 2 seconds and a height of 9 m/s, so its area is 2 * 9 = 18 m. Adding the areas together, Bert ran a total distance of 27 + 18 = 45 meters.

For Ostrich Ernie:

The area under the graph can also be divided into two sections: a triangle and a rectangle. The triangle's base is 4 seconds and its height is 12 m/s, so its area is (1/2) * 4 * 12 = 24 m. The rectangle has a base of 2 seconds and a height of 6 m/s, so its area is 2 * 6 = 12 m. Adding the areas together, Ernie ran a total distance of 24 + 12 = 36 meters.

b) To calculate the average velocity of Bert, we need to divide the total distance he ran (45 meters) by the total time it took (5 seconds). Therefore, Bert's average velocity is 45 meters / 5 seconds = 9 m/s.

c) The initial acceleration of Ernie can be determined by finding the slope of the velocity-time graph during the initial portion. From the graph, we can see that Ernie's velocity increases by 6 m/s over the first 2 seconds. Therefore, his initial acceleration is (change in velocity) / (change in time) = 6 m/s / 2 seconds = 3 m/s^2.

d) Without further calculation, we can determine that Ernie had the greatest initial acceleration. This is because Ernie's velocity increases at a steeper slope during the initial part of the graph compared to Bert's velocity. The greater the slope, the greater the acceleration. Therefore, Ernie had the greatest initial acceleration.

Juliet opened a savings account at a bank by depositing $75. The account earns simple interest at a rate of 4% per year. The money has been in the account for 5 years, and Juliet has not made any more deposits or withdrawals. How much money is in Juliet’s account?A) $270.00
B) $78.00
C) $80.00
D) $90.00

Answers

The money has been in the account for 5 years. This means that the amount of deposit was increased for 5 times.
75*1.04*1.04*1.04*1.04*1.04=75*1.04^5≈91.3 $
In this way i prefer to chose D) $90.00 beacuse it's the nearest number

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Factor the four-term polynomial.pq - 3r + pr - 3q. (p - 3)(q + r) (p - r)(q + 3) (p + 3)(q - r)

Raymond just got done jumping at Super Bounce Trampoline Center. The total cost of his session was \$43.25$43.25dollar sign, 43, point, 25. He had to pay a \$7$7dollar sign, 7 entrance fee, and \$1.25$1.25dollar sign, 1, point, 25 for every minute he was on the trampoline.

Pl help heres the ss for it