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77julia77 [94]
2 years ago
9

2x+3y=20 -2x+y=4 Solve algebraic

Mathematics
1 answer:
maxonik [38]2 years ago
7 0
The first one is 2x + 3y = 5xy




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The arch of a bridge can be modeled by <img src="https://tex.z-dn.net/?f=y%3D-%5Cfrac%7B1%7D%7B170%7D%28x-225%29%28x%2B225%29" i
Usimov [2.4K]

Answer:

450 feet at ground level

Step-by-step explanation:

The width of the bridge at ground level will be where the function intercepts the x-axis also known as the roots or zeros of the function. They are found using the zero product property to set each factor equal to 0.

This means (x-225) = 0 and (x + 225) = 0. So x = -225, 225.

This means the width is the absolute value of |-225| + 225 since distance cannot be negative. This makes it 450 feet.

8 0
3 years ago
Read 2 more answers
5. The sides of a right triangle have lengths of 7 m, 9 m, and 10 m. The hypotenuse
Yuliya22 [10]
C because the hypotenuse is the longest
4 0
2 years ago
Read 2 more answers
1)
vaieri [72.5K]

Answer:

see explanation

Step-by-step explanation:

Note the common difference d between consecutive terms of the sequence

8 - 6 = 10 - 8 = 2

This indicates that the sequence is arithmetic with n th term

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 6 and d = 2, thus

a_{n} = 6 + 2(n - 1) = 6 + 2n - 2 = 2n + 4 ← explicit formula

Hence

a_{130} = (2 × 130) + 4 = 260 + 4 = 264

8 0
3 years ago
Help me please ineed your help
____ [38]
I can’t see the problem
4 0
2 years ago
What is the equation of this line in standard form? −8x+7y=25 −9x+8y=−23 −8x+9y=−23 −8x+9y=23
kvasek [131]
<span>−8x+7y=25 is already in standard form, altho some people would prefer to re-write it as

</span><span>−8x+7y-25 = 0.

You have shared 4 equations here.  Next time, please separate them with commas or semi colons, or type just 1 equation per line, for increased clarity.  Thanks.</span>
5 0
3 years ago
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