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nlexa [21]
3 years ago
15

What are the solutions to 2x^2 + 7x = 4

Mathematics
1 answer:
laila [671]3 years ago
5 0
2x^2+7x-4=0
Δ=7^2-4*2*(-4)
Δ=49+32
Δ=81
x1=(-7+V81)/4=(-7+9)/4=2/4=1/2
x2=(-7-9)/4=-16/4=-4

the solutions: x1= 1/2 and x2= - 4
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See the picture below!!
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Answer:

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Step-by-step explanation:

Question 1

Angle = 60°

Hypotenuse = x

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Opposite = 15

<u>Step 1: Find x</u>

Sin (angle) = opposite/hypotenuse

Sin (60°) = 15/x

x = 10√3 = 17.3

<u>Step 2: Find y</u>

Tan (angle) = opposite/adjacent

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y = 5√3 = 8.7

Question 2

<u>Step 1: Find the diagonal of the base</u>

c² = a²+b²

c² = 6² + 10²

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7 0
3 years ago
Help plz:)!!!!!!!!!!!!
solmaris [256]
Answer:first one
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5 0
3 years ago
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Gnom [1K]

Answer:

The answer would be A.

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7 0
3 years ago
Solve this equation. 5n+7=7(n+1)-2n
9966 [12]
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If you want to solve for n, subtract 7 from both sides

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3 0
3 years ago
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A company makes steel rods shaped like cylinders. Each rod has a diameter of 4 centimeters and a height of 60 centimeters. If th
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Answer:

See below.

Step-by-step explanation:

1) Please check the number of volume of steel. It should be 54,259.2

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2) If so,

First

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5 0
3 years ago
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