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Scorpion4ik [409]
3 years ago
7

Plz help me solving this problem

Mathematics
1 answer:
mrs_skeptik [129]3 years ago
6 0
Which one am i suppose 2 do ?
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MARKING AS BRAINLIEST! LAST ATTEMPT! ) show ur work
matrenka [14]

Answer:

\sqrt{28} =\sqrt{(7)(4)} =2\sqrt{7} \\\sqrt{40} =\sqrt{(10)(4)} =2\sqrt{10} \\\sqrt{108} =\sqrt{(36)(3)} =6\sqrt{3} \\\sqrt{125} =\sqrt{(25)(5)} =5\sqrt{5}

-6\sqrt{81} =-6(9)=-54

\sqrt{80} =\sqrt{(16)(5)} =4\sqrt{5)} \\3\sqrt{60} =3\sqrt{(15)(4)} =(3)(2)\sqrt{15} =6\sqrt{15}

-\sqrt{200} =-\sqrt{(100)(2)} =-10\sqrt{2}

4\sqrt{320} =4\sqrt{(64)(5)} =(4)(8)\sqrt{5} =32\sqrt{5}

Hope this helps

7 0
3 years ago
What is the value of z so that -9 and 9 are both solutions of x^2+z=103?
Ira Lisetskai [31]
The answer is C.
x^2 + z = 103x^2 + 22 = 103*Subtract both sides by 22*x^2 + 22 - 22 = 103 - 22x^2 = 81*square root both sides to find x*√x^2 = <span>√81</span>
<span>x = +- 9</span>
8 0
3 years ago
What is the difference between a theorem and a proof
sertanlavr [38]

Answer: it should be C

Step-by-step explanation:

proof is (countable) an effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial while theorem is (mathematics) a mathematical statement of some importance that has been proven to be true

5 0
3 years ago
250 students were asked to choose their favorite color. How many more students chose purple than red as their favorite color? 26
nevsk [136]

Answer:

10 more students chose purple than red as their favorite color

Step-by-step explanation:

Step 1

Determine the proportion of students that chose each color

purple=26%

red=22%

Step 2

Use the expression for the number of students per color as follows;

Number of students per color=proportion per color×total number of students

for purple;

proportion that chose purple=26%

total number of students=250

replacing;

Number of students that chose purple=(26/100)×250=65 students

for red;

proportion that chose red=22%

total number of students=250

replacing;

Number of students that chose purple=(22/100)×250=55 students

Step 3

Difference=65-55=10

10 more students chose purple than red as their favorite color

6 0
4 years ago
Which of the following is the shape of a cross-section of the figure shown below?
Anna71 [15]

Answer:

B. Pentagon

Step-by-step explanation:

Pentagon (figure having 5 sides) is the shape of the cross-section of the figure.

5 0
3 years ago
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