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2 years ago

HELP PLEASE!!!!

Mathematics

1 answer:

Bond [772]2 years ago

7 0

Answer:

B. 28

Step-by-step explanation:

Since (4x + 10) and 122 degrees are angles that are across from each other (vertical angles), they equal each other.

4x + 10 = 122

-10 -10

4x = 112

/4 /4

x = 28

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Expand and simplify (x + 4)(x-7)

Vika [28.1K]

Answer.

(x+4)×(x-7)

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3 years ago

A water tank has a square base with each side of length 4 meters. Water enters through a hose at a constant rate of 20 liters pe

dmitriy555 [2]

Answer:

378.33 minutes

Step-by-step explanation:

From the question, we're told that

Length of the side of the square, l = 4 m

Then the current volume of water = (4 m)³ = 64 m³3 = 64,000 Liters

64,000 + [∫(20 - t) dt from 0 to t] = 0, solving the integral, we have

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t^2 - 40t - 128,000 = 0, on solving the quadratic equation(using general formula), we find that

t = 378.33 minutes

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3 years ago

marita orders 12 yards of material to make banners. if she needs 1 foot of fabric for each banner, how many banners can she make

Aliun [14]

36 banners is the corect answer

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3 years ago

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3 years ago

Find the value of x. 7, 8, and 9 please!

natima [27]

Answer:

7) x= 5, 8) x= 6, 9) x= 7

Step-by-step explanation:

As per the secant theoram, if two secant intersect outside the circle then the product of the exterior secant and total length of each secant are equal.

7) ∴ $(x+3)\times 3= (10+2)\times 2$

opening parethesis and distributing 3 with x and 3.

⇒ $3x+9=24$

subtracting 9 on both side.

⇒ $3x=15$

cross multiplying

∴ x= 5.

8) $(3+5)\times 5= (x+4)\times 4$

Opening parethesis and distributing 4 with x and 4.

⇒ $8\times 5=4x+16$

⇒ $40=4x+16$

subtracting 16 on both side.

⇒ $24=4x$

cross multiplying

∴ x= 6.

9) $(x+5)\times 5= (6+4)\times 6$

opening parethesis and distributing 5 with x and 5.

⇒ $5x+25=60$

subtracting 25 on both side.

⇒ $3x=35$

cross multiplying

∴ x= 7.

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3 years ago