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Galina-37 [17]
3 years ago
8

If a = -2.6, what is the value of -a

Mathematics
2 answers:
7nadin3 [17]3 years ago
8 0

if a = -2.6

then -a = -(-2.6)

so -a =2.6

Maksim231197 [3]3 years ago
6 0

-2.6 + -2.6= 5.2......right? Or am I looking at this wrong?

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If an airplane in a 1 in. : 4 ft. scale drawing is 5 in. long, how long is the actual airplane? Use proportions to solve the pro
Lunna [17]

Answer:

20ft

Step-by-step explanation:

20ft is the answer because you would do 4 x 5 = 20, since the scale factor is 1in : 4ft

Hope this helped :)

4 0
2 years ago
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
Classify each statement based on whether a positive or negative rational number represents it. elevation of 3,234 feet above sea
Leya [2.2K]

Answer:

elevation of 3,234 feet above sea level   Positive

losing $32.50   Negative  

depositing $230 in an account    Positive

withdrawing $2,432 from an account   Negative

2°C below 0°C  Negative

10 floors above ground level   Positive

Step-by-step explanation:

elevation of 3,234 feet above sea level   Positive   This is above ground

losing $32.50   Negative     it is less than you had

depositing $230 in an account    Positive   putting money in

withdrawing $2,432 from an account   Negative   taking money out

2°C below 0°C    less than 0

10 floors above ground level      above 0

6 0
3 years ago
4x + 33 = 10x + 3 <br> show your work
asambeis [7]

Answer:

on 4x + 33 = 10x + 3, we could use inverse operation and move 10x to left side, which will create -6x+33=3. we could also use the same thing to 33 and get -6x=-30. if we divide -30 by -6, we would get 5

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Simplify 324 please and thanks
olga55 [171]

Answer:

18

Review the factors of 324 to get the square root which is 18

6 0
3 years ago
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