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kari74 [83]
3 years ago
11

Which operation is used for the equation down below

Mathematics
1 answer:
mario62 [17]3 years ago
3 0

Answer:

B

Step-by-step explanation:

2x+8=9

you want to isolate the variable so you subract 8 from both sides

2x=1

now you want x by itself so you divide by 2 on both sides

x=1/2 or x=0.5

Hope this helped :)

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7z2 5z4 d3 d8<br> I don't know how you are supposed to do it?
Serga [27]

Answer:

35 {z}^{6} {d}^{11}

Step-by-step explanation:

Assuming you are supposed to simplify:

7 {z}^{2}  \times 5 {z}^{4}  \times  {d}^{3}  \times  {d}^{8}

Then we need to apply the product rule of indices.

{a}^{m}  \times  {a}^{n}  =  {a}^{m + n}

So we multiply to get:

35 {z}^{2 + 4}  \times  {d}^{3 + 8}

We now simplify the exponents to get:

35 {z}^{6}  \times  {d}^{11}

Therefore the required product is

35 {z}^{6} {d}^{11}

3 0
3 years ago
1. Find the Length of Line AD A(6, 2) D(-3, -2)
densk [106]

Answer:

5

Step-by-step explanation:

\sqrt{(2-(-2))^{2}  + (6-(-3))^2}

=\sqrt{4^{2}  + 3^{2} } \\

=\sqrt{25}

=5

8 0
2 years ago
A tree grows three-fourth feet per year. How long will it take the tree to grow from
xenn [34]

Answer:

9 years

Step-by-step explanation:

37-21.25 =15.75ft

1.75ft per year

15.75  / 1.75  = 9 years

4 0
2 years ago
Two slits are illuminated by a 348 nm light. The angle between the zeroth-order bright band at the center of the screen and the
Andre45 [30]

Answer:0.369 m

Step-by-step explanation:

Given

Distance between slit and screen is D=154 cm

Wavelength \lambda =348 nm

Angle between zeroth order bright fringe and Fourth-order bright fringe is \theta =13.5^{\circ}

let distance between the slits be d

Distance of n th bright fringe From central Fringe is given by

y_n=\frac{nD\lambda }{d}

Also \tan \theta =\frac{y_4}{D}

y_4=\tan (13.5)\cdot 1.54

y_4=0.24\times 1.54

y_4=0.369 m

5 0
3 years ago
On a map the key indicates that 1/4 inch = 1/2 mile. if two cities on themap are 4 1/2 inches apart what is the distance between
Ilya [14]
Let the actual distance be x mile.
1/4 inch = 1/2 mile
9/2 inch = x mile
(9/2)/(1/4)=x/(1/2)
            18=2x
              x=9

the actual distance is 9 mile.
8 0
2 years ago
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