Answer: 2.55 as a mixed number is 51/20
7 units
5 units
7√ units
Answer:
5
Step-by-step explanation:
reenter
medical
memory
Answer:
( D) Memory
Step-by-step explanation:
Answer:
The third one
Step-by-step explanation:
a2 + 4a + 16
a2 + 14a + 49
a2 + 15a + 75
a2 + 26a + 169
The exactly two answers are correct are a² + 14a + 49 and a² + 26a + 169.
The condition for the perfect trinomials is if the coefficient of a² = 1 and If you divide the middle number coefficient by 2 and you square it you get the last term.
For all the options, the coefficient of a² = 1.
a² + 4a + 16.
Coefficient of a = 4.
4/2 = 2
2² = 4, this does not equal the last term so it is not a perfect square trinomial.
a² + 14a + 49.
Coefficient of a = 14.
14/2 = 7
7² = 49, this is equal to the last term so it is a perfect square trinomial.
And the perfect square is (a +7)²
Similarly, if you test the last option.
a² + 26a + 169.
Coefficient of a = 26.
26/2 = 13
13² = 169, this is equal to the last term so it is a perfect square trinomial.
And the perfect square is (a +13)²
The only two options are: a² + 14a + 49 and a² + 26a + 169. Other options do not pass this test.
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