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3 years ago

4√3 − 5√7 + 2√3 + 6√7

Mathematics

2 answers:

neonofarm [45]3 years ago

3 0

Answer:

$\dashrightarrow \: { \tt{4 \sqrt{3} - 5 \sqrt{7} + 2 \sqrt{3} + 6 \sqrt{7} }} \\ \\ \dashrightarrow \: { \tt{(4 - 2) \sqrt{3} + (6 - 5) \sqrt{7} }} \\ \\ \dashrightarrow \: { \tt{2 \sqrt{3} + \sqrt{7} }} \\ \\ \dashrightarrow \: { \tt{ \sqrt{3 \times 4} + \sqrt{7} }} \\ \\ \dashrightarrow \: { \tt{ \sqrt{12} + \sqrt{7} }}$

vazorg [7]3 years ago

3 0

Answer:

Step-by-step explanation:

$4\sqrt{3} - 5\sqrt{7} +2\sqrt{3} +6\sqrt{7}=4\sqrt{3} + 2\sqrt{3} -5\sqrt{7}+6\sqrt{7}$

$=(4+2)\sqrt{3}+ (-5 +6)*\sqrt{7}\\\\=6\sqrt{3}+1\sqrt{7}$

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There are 18 girl in a class and boys in the class is 3:2. Find the number of boys.

Sunny_sXe [5.5K]

Answer

Explanation

2xand 3x

let 3 be 3x

3x=18

X=18/3

X=6

now

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8 0

3 years ago

What the slope of(7,3) (6,-2)

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$slope = \frac{ - 2 - 3}{6 - 7} \\$

$slope = \frac{ - 5}{ - 1} \\$

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6 0

3 years ago

Pls help I will give you a crown pls 13 points

boyakko [2]

Option C: $y = \frac{1}{2}x+\frac{5}{2}$ is the right answer

Step-by-step explanation:

Given points are:

(x1,y1) = (-1,2)

(x2,y2) = (3,4)

First of all, the slope has to be found

$m =\frac{y_2-y_1}{x_2-x_1}\\=\frac{4-2}{3+1}\\= \frac{2}{4}\\=\frac{1}{2}$

The slope-intercept form of line is:

$y = mx+b$

Putting the value of m

$y = \frac{1}{2}x+b$

Putting (3,4) in equation

$4 = \frac{1}{2}(3) +b\\4 = \frac{3}{2} +b\\b = 4 - \frac{3}{2}\\= \frac{8-3}{2}\\=\frac{5}{2}$

Putting the value of b

$y = \frac{1}{2}x+\frac{5}{2}$

Hence,

Option C: $y = \frac{1}{2}x+\frac{5}{2}$ is the right answer

Keywords: Equation of line, slope

Learn more about equation of line at:

#LearnwithBrainly

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3 years ago

A shopkeeper selling an article at a discount of 25% looses Rs.125.If he allows 10% discount he gains Rs 250.Find the marked pri

adell [148]

Answer:

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3 years ago

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e-lub [12.9K]

Answer:

7. 5 $\frac{5}{8}$ pizza

8. B

9. 11 $\frac{1}{5}$ inches

10. -12

11. $\frac{3}{20}$

12. 4

Step-by-step explanation:

7. 3 $\frac{1}{2} \\$ + 2 $\frac{1}{8}$

make them mixed fractions: $\frac{7}{2}$ + $\frac{17}{8}$

get a common denominator by multiplying $\frac{7}{2}$ by 4: $\frac{28}{8}$ + $\frac{17}{8}$

add the numerators: $\frac{45}{8}$

simplify the fraction by dividing 45 by 8: 5 $\frac{5}{8}$

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therefore, y = 6x

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divide 8 by 5: 1 $\frac{3}{5}$

multiply 7 by 1 $\frac{3}{5}$ : 11 $\frac{1}{5}$

L = 11 $\frac{1}{5}$ inches

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subtract 5 from each side: -2x = 24

divide each side by -2: x = -12

11. fruit = 15%

15% = 15/100

simplify by dividing by 5: $\frac{3}{20}$

12. the y-intercept is where the line crosses the y-axis (the vertical one). the line crosses the y-axis at 4.

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3 years ago