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2 years ago

Help due in 7 minutes!!

Mathematics

1 answer:

kotykmax [81]2 years ago

5 0

Answer:

part B

Step-by-step explanation:

please mark me brain list

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Find the perimeter of a rectangle with a width of (x - 3) and a length of 4x

Firdavs [7]

Step-by-step explanation:

__________

| |

x-3| | x-3

| |

|__________

Add all sides together to get perimeter

2(4x)+2(x-3)=10x-6

7 0

3 years ago

PLZ NEED HELP DUE TONIGHT

coldgirl [10]

Answer:

-10 and -2/5

Step-by-step explanation

-10÷ $-\frac{2}{5}$ = 25

Check

25 > 10

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3 years ago

The product of 1 1/2 and 2 is

Over [174]

Method 1:

Convert the mixed number to the improper fraction:

$1\dfrac{1}{2}=\dfrac{1\cdot2+1}{2}=\dfrac{3}{2}$

Make the product:

$1\dfrac{1}{2}\cdot2=\dfrac{3}{2}\cdot2$

canceled 2

$=\dfrac{3}{\not2_1}\cdot\not2^1}=\boxed{3}$

Method 2:

$1\dfrac{1}{2}=1+\dfrac{1}{2}$

$1\dfrac{1}{2}\cdot2=\left(1+\dfrac{1}{2}\right)\cdot2$

use the distributive property a(b + c) = ab + ac

$(1)(2)+\left(\dfrac{1}{2}\right)(2)=2+1=\boxed{3}$

7 0

3 years ago

Show all ways you can use to find the area of the rectangle

marin [14]

• WxL (width multiplied by length)!l
• creating a two right angled triangles, finding the area through the Pythagoras theorem for both triangles and then add both areas together

6 0

3 years ago

Solve x2 + 10x + 7 = 0 by completing the square. Which equation is used in the process?

BaLLatris [955]

$x^2+10x+7=0\ \ \ \ |subtract\ 7\ from\ both\ sides\\\\x^2+2x\cdot5=-7\ \ \ |add\ 5^2\ to\ both\ sides\\\\x^2+2x\cdot5+5^2=-7+5^2\ \ \ |use\ a^2+2ab+b^2=(a+b)^2\\\\(x+5)^2=-7+25\\\\(x+5)^2=18\iff x+5=\pm\sqrt{18}\\\\x+5=-\sqrt{18}\ or\ x-5=\sqrt{18}\\\\x+5=-\sqrt{9\cdot2}\ or\ x-5=\sqrt{9\cdot2}\\\\x+5=-\sqrt9\cdot\sqrt2\ or\ x-5=\sqrt9\cdot\sqrt2\\\\x+5=-3\sqrt2\ or\ x-5=3\sqrt2\ \ \ |subtract\ 5\ from\ both\ sides\\\\\boxed{x=-5-3\sqrt2\ or\ x=-5+3\sqrt2}$

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3 years ago

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