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ankoles [38]
3 years ago
13

A researcher wishes to find out shearer givinh a student 1 million in cash will improve or ruin the students grades in school

Mathematics
1 answer:
arlik [135]3 years ago
6 0
Need more info please.
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Is either is either x equals 20 or x equals 12 the solution to X -8 = 4 ​
Contact [7]

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12

Step-by-step explanation:

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2 years ago
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What is 28 times 4 over 7<br> ]
ddd [48]

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16

Step-by-step explanation:

3 0
3 years ago
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SOMEONE HELP PLEASE
Alborosie
I’m sorry but I can’t understand what the question is saying
4 0
2 years ago
Let A = { x ∈ R : x 2 − 5 x + 4 ≤ 0 } , B = (3 , 5), and C = (3 , 4]. Show that A ∩ B = C . (Recall, you must show two separate
kolbaska11 [484]

Answer:

You can proceed as follows:

Step-by-step explanation:

First solve the quadratic inequality x^{2}-5x+4\leq 0. To do that, factorize, then we have that (x-4)(x-1)\leq 0. This implies that

x-1\leq 0\, \text{and}\, x-4\geq 0

or

x-1 \geq 0\, \text{and}\, x-4\leq 0

In the first case the solution is the empty set \emptyset. In the second case the solution is the interval 1\leq x \leq 4. Now we have that

A=[1,4]

B=(3,5)

C=(3,4].

To show that A\cap B\subseteq C consider x\in A\cap B. Then 1\leq x \leq 4\, \text{and}\, 1, this implies that 3, then x\in C. Now, to show that C\subseteq A\cap B consider x\in C, then 3, then 1\leq x \leq 4\, \text{and}\, 3, then x\in [1,4] \, \text{and}\, x\in (3,5), this implies that x\in A\cap B.

Observe the image below.

7 0
3 years ago
10 subtracted from a number is 15.
Vlada [557]
When negative five is subtracted from a number the result is 10. The number is 5.
x - (-5) = 10
x + 5 = 10
x = 10 - 5
x = 5
8 0
3 years ago
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