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2 years ago

Find the the first two steps necessary to simplify 16+4(3+8)2-21

1 answer:

8 0

Due the parentheses first so 16+4+11*2-21 then multiply 16+4+22-21 from here you can answer left to right 20+4+22-21 then 24+1=25

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What is the first step to 7(x – 4) = 84.

ss7ja [257]

Parenthesis according to the PEMDAS rule

So
7(x - 4) = 84

Would be

7x -28 = 84

Hope this helped :)

5 0

3 years ago

Read 2 more answers

I NEED HELPPP ON THIS PLZZZ

Anika [276]

Answer:

Perimeter of ABCD = 56 units

Perimeter of WXYZ = 140 units

Step-by-step explanation:

To find the perimeter of ABCD, find the sum of all sides

18 + 18 + 10 + 10 = 56

To find the side lengths of WXYZ, use the equation: $\frac{image}{pre-image}$

45/18 = 2.5

You can also cross multiply to find the missing side lengths, but I'll show you this other way...

Multiply the pre-image side lengths by 2.5

18 × 2.5 = 45

10 × 2.5 = 25

45 and 25 of the new side length of WXYZ

To find the perimeter of WXYZ, find the sum of all sides.

45 + 45 + 25 + 25 = 140

WX = 45, XY = 25, YZ = 45, ZW = 25

3 0

2 years ago

Let f(x) = √x-5 Find f^ -1.

iris [78.8K]

Answer:

$f^{-1}(x)= x^2 + 5 \,,\,\,x\geq 0$

Step-by-step explanation:

Use the method of swapping x and y and isolating y.

$f(x) = y = \sqrt{x-5}\,,\,\,\,x\geq 5,y\geq0\\\\f^{-1}:x=\sqrt{y-5}\,,\,\,\,y\geq 5, x\geq 0\\x^2 = y-5\\y = x^2 + 5 = f^{-1}(x)\\$

Note that domain/range will be swapped as well.

5 0

3 years ago

Helppp againnn... please-

tankabanditka [31]

Answer:

Its 16/81

Step-by-step explanation:

4 0

2 years ago

**BRAINLIEST IF ANSWERED***

goblinko [34]

Answer:

(D)7 in.

Step-by-step explanation:

A regular hexagon can be divided into six equilateral triangles.

Therefore:

$b=\dfrac{c}{2}$

Applying Pythagoras Theorem

$c^2=12^2+b^2\\c^2=12^2+(\frac{c}{2})^2\\c^2-(\frac{c}{2})^2=12^2\\c^2-\dfrac{c^2}{4}=144\\\dfrac{4c^2-c^2}{4}=144\\\dfrac{3c^2}{4}=144\\$Cross multiply\\3c^2=144 \times 4\\3c^2=576\\$Divide both sides by 3\\c^2=192\\$Therefore:\\c=\sqrt{192}\\c=8\sqrt{3}$ in.$

Recall that b=c/2

Therefore:

$b=4\sqrt{3} \approx 7$ in.$

The value of b is 7 inches.

6 0

2 years ago