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mel-nik [20]
3 years ago
11

Please help! (20 points)

Mathematics
2 answers:
garri49 [273]3 years ago
8 0

Answer:

The answer is B, C, E.

Step-by-step explanation:

B: t > 0

C: -4.3 < a

E: k less-than Negative StartFraction 5 Over 7 EndFraction

valentina_108 [34]3 years ago
6 0

Answer:

Guys the real answer is B C E

I really hope this helps :)

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satela [25.4K]

Answer:

A

Step-by-step explanation:

5 0
3 years ago
Please help!!! Will give brainliest!!!<br><br> What is 50x+2000y=3?<br> solve for x.
san4es73 [151]

Answer:

x=350−40y

Explanation:

-----

5 0
3 years ago
Read 2 more answers
If breadth of a cuboid is one-fourth of its length,height is 5cm and total surface area is 328 cm²,find the length and breadth o
velikii [3]

The length of cuboid is 16 cm and breadth of cuboid is 4 cm.

<h3>How to find the Surface Area of Cuboid?</h3>

A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (L), Breadth (B), and Height (H) of the cuboid and use the formula, SA=2 x ( LB + BH + HL ) , to find the surface area.

Here, We have given that height of the cuboid is 5cm.

Let length of the cuboid = X cm

so, the breadth of the cuboid = \frac{X}{4} cm

also, we have given that total surface area is 328 cm²

Now, put all the values in the formula of Surface Area (SA):

SA = 2 x ( LB + BH + HL )

SA = 2 x ( X²/4 + 5X/4 + 5X )

SA = 2 x ( ( X² + 5X + 20X) / 4 )

SA = ( X² + 5X + 20X ) / 2

X² + 5X + 20X = 328 x 2

X² + 25X = 656

X² + 25X - 656 = 0

using Quadratic Formula: see the attached figure for the formula.

here Discriminant D = b² - 4ac

D = 625 - 4(-656)

D = 3249

on putting value of D or b² - 4ac in the formula we get

X =  ( -25 + 57 ) / 2 and ( -25 - 57 ) /2

length can not be negative so we eliminate the second answer.

now, X = 16 cm

breadth = X /4 = 4 cm

Hence, The length of cuboid is 16 cm and breadth of cuboid is 4 cm.

Learn more about " Quadratic Formula " from here: brainly.com/question/2615966

#SPJ9

3 0
2 years ago
Place the grouping symbols to make this equation true. 84-48/8-4=72
vlabodo [156]
84-6-4=72
48/4=12. 84-12= 72
84 - (48/(8-4)) = 84 - (48/4) -4 = 72
84 - 12 = 72
4 0
3 years ago
This is urgent please help me out.The side lengths of different triangles are given. Which triangle is a right triangle?
Lelu [443]

Answer:

C. √18, √7, 5

Step-by-step explanation:

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6 0
2 years ago
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