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olga_2 [115]
3 years ago
14

PLEASE! Someone help me answer this and explain it

Mathematics
1 answer:
xenn [34]3 years ago
3 0

Answer:

12.5

Step-by-step explanation:i did that problem before

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Can you please explain how you got the answer? Also plz tell me what the closed and open circle mean again..
ale4655 [162]

Answer: A

Step-by-step explanation:

  • Open circle means that x does not equal that number. For example, the open circle on C is on 8, so that shows x is not equal to 8.
  • Closed circle means that x does equal that number. For example on A, there is a closed circle on 8, so x could equal 8.

First, we need to solve the equation.

  1. Subtract 200 frim 1200 -> 125x ≥ 1000.
  2. Divide 125 from 1000 to isolate the x -> x ≥ 8

So, that means x is bigger than or equal to 8.

8 0
3 years ago
Read 2 more answers
What is the degree of the monomial 9xy³z⁷
xxMikexx [17]

Answer:

the degree of the monomial is 11

Step-by-step explanation:

x = 1

y^3 = 3

z^7 = 7

add the exponents 1+3+7 = 11

5 0
3 years ago
Draw a tape diagram to represent the following<br> equation:<br> 3x + 15 = 90
Vikentia [17]

Answer:

25

Step-by-step explanation:

Subtract 15 from both sides then divide by 3.

3 0
2 years ago
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Find the values of the variables in the parallelogram. The diagram is not to scale.
monitta

Answer:

Step-by-step explanation:

5 0
3 years ago
Someone help me please!
andriy [413]

Answer:

To solve the first inequality, you need to subtract 6 from both sides of the inequality, to obtain 4n≤12. This can then be cancelled down to n≤3 by dividing both sides by 4. To solve the second inequality, we first need to eliminate the fraction by multiplying both sides of the inequality by the denominator, obtaining 5n>n^2+4. Since this inequality involves a quadratic expression, we need to convert it into the form of an^2+bn+c<0 before attempting to solve it. In this case, we subtract 5n from both sides of the inequality to obtain n^2-5n+4<0. The next step is to factorise this inequality. To factorise we must find two numbers that can be added to obtain -5 and that can be multiplied to obtain 4. Quick mental mathematics will tell you that these two numbers are -4 and -1 (for inequalities that are more difficult to factorise mentally, you can just use the quadratic equation that can be found in your data booklet) so we can write the inequality as (n-4)(n-1)<0. For inequalities where the co-efficient of n^2 is positive and the the inequality is <0, the range of n must be between the two values of n whereby the factorised expresion equals zero, which are n=1 and n=4. Therefore, the solution is 1<n<4 and we can check this by substituting in n=3, which satisfies the inequality since (3-4)(3-1)=-2<0. Since n is an integer, the expressions n≤3 and n<4 are the same. Therefore, we can write the final answer as either 1<n<4, or n>1 and n≤3.

5 0
3 years ago
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