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Semmy [17]
3 years ago
7

J(h - 9) + 2; use h=9, and j = 8

Mathematics
1 answer:
shepuryov [24]3 years ago
3 0

It should be -6

8(8-9)+2

Step-by-step explanation:

You might be interested in
Simplify 2 + 3/5x - 1 - 1/5x
tankabanditka [31]
The answer would be c. because 2-1= 1 and 3/5x - 1/5x= 2/5x. All adding up to 1+2/5x.
5 0
2 years ago
to estimate the height of the jin mao tower in shanghai , a tourist sights the top of the tower form a mirror that is 86.7 meter
Ray Of Light [21]

Answer:

The height of the tower = 420.48 meters

Step-by-step explanation:

For better understanding of the solution, see the figure attached below :

Let the height of the tower be x meters

Now, using the laws of reflection : angle of reflection = angle of incidence

Also, both the tower and the tourist are standing parallel to each other

⇒ ∠A = ∠i ( Alternate interior angles are equal)

Similarly, ∠D = ∠r ( Alternate interior angles)

But, ∠i = ∠r

⇒ ∠A = ∠D

Also, the tourist and the tower is perpendicular to the ground surface.

⇒ m∠B = m∠E = 90°

Now, in ΔABC and ΔDEC

∠A = ∠D (Proved above)

m∠B = m∠E = 90°

So, by AA postulate of similarity of triangles, ΔABC ~ ΔDEC

As the sides of similar triangles are proportional to each other

\frac{AB}{DE}=\frac{BC}{EC}\\\\\implies\frac{1.92}{x}=\frac{0.4}{87.6}\\\\\implies x=\frac{87.6\times 1.92}{0.4}\\\\\bf\implies x = 420.48\textbf{ meters}

Hence, The height of the tower = 420.48 meters

5 0
3 years ago
Write two decimals that can be rounded to 2.5
zheka24 [161]
2.48 can be rounded pretty much any number between 2.45 to 2.5
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8 0
3 years ago
Read 2 more answers
8-x+4-2-8x= What does x equal
goldfiish [28.3K]

Answer:

-9x + 10

Step-by-step explanation:

3 0
3 years ago
a bottle of orange juice holds for 4/6 quarts of juice. a bottle of pineapple juice holds 2/3 quarts of juice. which bottle has
earnstyle [38]

Answer:

the orange juice has more ounces than the pineepple juice

Step-by-step explanation:

3 0
2 years ago
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