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tester [92]
3 years ago
8

I really need help I don't get it​

Mathematics
1 answer:
olga55 [171]3 years ago
5 0
B, a rectangle is a 2D shape, a rectangular prism is a 3D shape with rectangular faces
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Which of the following are solutions?
zloy xaker [14]

This is a quadratic equation. There's a shortcut (two shortcuts really) called the Shakespeare Quadratic Formula (2b or -2b) applicable when the middle term is even:

x^2 - 2bx + c \textrm{ has zeros } x= b\pm \sqrt{b^2-c}

ax^2 - 2bx + c \textrm{ has zeros } x= \dfrac 1 a( \left b\pm \sqrt{b^2-ac} \right)

OK, our problem is

9x^2 - 6x -7 = 0

x = \frac 1 9 (3 \pm \sqrt{9-(9)(-7)}) = \frac 1 9(3 \pm \sqrt{72})= \frac 1 9(3 \pm 3 \sqrt{8}) = \frac 1 3(1 \pm \sqrt 8)

Typically we'd write \sqrt 8 = 2 \sqrt 2 but the answers here don't so we won't either.

Answer: C and D

7 0
3 years ago
This week Luis made 80% of what he made last week. If he made $72 this week, how much did he make last week
ValentinkaMS [17]
$57.60 is the answer to the question
7 0
3 years ago
Read 2 more answers
-<br> Use the order of operations to simplify 4(3.5 - 1.5) -
irinina [24]

Answer:

When simplified this equation equals 8.

Step-by-step explanation:

Let me show you my work.  

4 ( 3.5 - 1.5 ) = 4 ( 2 )

4 ( 2 ) = 8 because 4 times 2 = 8

Hope this helps. . .

UwU

6 0
2 years ago
Read 2 more answers
What’s the distance between (5,1)and(3,6)
laiz [17]

<u>How to Find the Distance Between Two Points</u>

Distance formula: d(P, Q) =√(x2 − x1)^2+(y2 − y1)^2

If you use this equation the answer will be 5.

4 0
3 years ago
A sample of 260 students enrolled at a university were asked what they intended to do after graduation. The results are shown be
vovikov84 [41]
ANSWER

30\%


EXPLANATION

The total number of students can be calculated by adding all the frequencies.


From the graph the total frequency is,

39+117+78+26 =260

The number of students who intend to go into state or local government after graduation is 78.


The percentage of students who intend to go into state or local government after graduation

=  \frac{78}{260}  \times 100\%

=  \frac{3}{10}  \times 100\%

= 30\%

4 0
3 years ago
Read 2 more answers
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