3 years ago

Can you explain 3 and 4 and tell met he right answers if I'm wrong?

Mathematics

1 answer:

defon3 years ago

8 0

Answer:

3) = A+ D 4)= A and C

Step-by-step explanation:

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How do you find mid value x in a grouped table in statistics

vlabodo [156]

Step-by-step explanation:

$mid \: value \\ = \frac{upper \: limit + lower \: limit}{2} \\ \\ for \: example \\ for \: group \: 10 - 20 \\ mide \: value = \frac{20 + 10}{2} = \frac{30}{2} = 15$

6 0

3 years ago

What number needs to be added to make a mean of 80 with the numbers 71 80 and 86

pentagon [3]

80*4=320-(71+80+86)=83 So 83 needs to be added.

3 0

3 years ago

Identify all of the following solutions of square root of x plus 14 end root plus 2 equals x.

BabaBlast [244]

$\bf \sqrt{x+14}+2=x\implies \sqrt{x+14}=x-2\impliedby \textit{squaring both sides}
\\\\\\
(\sqrt{x+14})^2=(x-2)^2\implies x+14=x^2-4x+4
\\\\\\
0=x^2-5x-10\impliedby \textit{now, using the quadratic formula}
\\\\\\
x=\cfrac{5\pm\sqrt{(-5)^2-4(1)(-10)}}{2(1)}\implies x=\cfrac{5\pm\sqrt{25+40}}{2}
\\\\\\
x=\cfrac{5\pm \sqrt{65}}{2}\implies x=
\begin{cases}
\cfrac{5+ \sqrt{65}}{2}\\\\
\cfrac{5- \sqrt{65}}{2}
\end{cases}$

5 0

3 years ago

Read 2 more answers

if the total angle of a triangle is 180 A- 43 1/2 B-5x C-26.5 and the started value is 20 what is X?

ValentinkaMS [17]

Answer:

x= 20.05 degree

180= 43.25+36.50+5x

180= 79.75+5x

5x=180-79.75

5x=100.25

x=20.25

ANGLE B= 100.25

3 0

3 years ago

Can someone please help me

weqwewe [10]

Answer:

Looks like (-5,1.5)

Step-by-step explanation:

Because it is halfway between the 1 and the 2

Hope This Helps!

5 0

3 years ago