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Mashcka [7]
2 years ago
13

The dimensions of the computer screen are modeled by the equation x^2+(x-4)= 20^2. What is the value of x, the lengths of the sc

reen?
Mathematics
2 answers:
Lady bird [3.3K]2 years ago
6 0

Answer:

X= 19.60596926, -20.60596926

Degger [83]2 years ago
5 0

Answer:403h2

Step-by-step explanation:

Combine like terms

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Ten large marbles weigh as much as 14 small marbles. How many large marbles weigh as much as 35 small marbles?
Paladinen [302]
To get the answer we can use proportion
10 large ------------- 14 small
x large -------------- 35 small
crossmultiply
10*35=x*14
350=14x            /:14
350:14=14x:14
25=x-its the answer
3 0
3 years ago
Read 2 more answers
A rectangular field is 50 m long and 30 m broad. All sides of the field have to be walled. Find out the length of the wal​
Ulleksa [173]

Answer:

=50×30

= 1500m.

Step-by-step explanation:

field = length = breadth

4 0
2 years ago
Help me please i do not understand
Andre45 [30]

Answer:

the equation of the line is:

y=-2x+-3

3 0
3 years ago
Two planes start flying towards each other simultaneously from two different cities. The distance between the cities is 960 mile
ANTONII [103]

Answer:

257.5 mph

332.5 mph

Step-by-step explanation:

The initial distance between the two planes is 960 miles, while the final distance (after t=1.5 h) is 75 miles, so the total distance covered by the two planes in 1.5h is

d=960-75=885 miles

Calling v1 and v2 the velocities of the two planes, we have the following equations:

(1) v_1 = v_2 + 75 --> velocity of plane 1 exceeds velocity of plane 2 by 75 mph

(2) v_1 t+ v_2 t=885 --> the total distance covered by the two planes is 885 miles (t=1.5 h is the time, and the products v1 t and v2 t represent the distance covered by each plane)

Substituting t=1.5 h, the second equation becomes:

1.5 v_1+1.5 v_2=885\\v_1 + v_2 = 590

By substituting (1) into this last equation, we find:

(v_2+75)+v_2 = 590\\2v_2 + 75 = 590\\2v_2 = 515\\v_2=257.5

And substituting this back into eq.(1), we find

v_1 = 257.5 + 75=332.5

So, the speeds of the two planes are

257.5 mph

332.5 mph



3 0
3 years ago
Find the area of a triangle with the given base and height<br><br> 7ft, 2in
Alekssandra [29.7K]

Answer:

A =  84 inches^2

Step-by-step explanation:

We know that the formula for the area of a triangle is given by

A = 1/2 b*h

Let's substitute what we know

We need the units to be the same

Convert 7 ft to inches

1 ft = 12 inches

Multiply both sides by 7

7 ft = 84 inches

A = 1/2 *84*2

A =  84 inches^2



6 0
3 years ago
Read 2 more answers
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