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tino4ka555 [31]
3 years ago
11

(-2.1) + (-0.1) how do you do this equation??

Mathematics
1 answer:
kenny6666 [7]3 years ago
7 0

Answer:

Step-by-step explanation:

A = -2.2

E.

( -2.1 ) + ( - 0.1 )

( -2.1 ) - 0.1. <—— over there, you will see that + is gone and the - has moved down, I done that because + plus with - equals to -.

-2.1

-0.1

———-

-2.2

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At the Science Museum, there is an exhibition with 150 displays about energy.
tatuchka [14]
<span>1/5
       
This is a matter of elimination. So let's figure out how many of each display there is. 30% of 150 = 0.30 * 150 = 45 displays about electricity. 2/5 * 150 = 0.40 * 150 = 60 displays about renewable energy 1/10 * 150 = 150/10 = 15 displays about gas. The rest of the displays are about nuclear power. So 150 - 45 - 60 - 15 = 30 displays about nuclear power. Since we want a fraction, we get 30/150 But 30/150 isn't in it's simplest form. The largest number that will evenly divide both 30 and 150 is 30. So divide both the numerator and denominator by 30 (30/30)/(150/30) = 1/5 So 1/5 of the displays are about nuclear power.</span>
8 0
3 years ago
If a varies directly as the cube root of b and if a=3 and b=64.find the formula connecting the variables hence find b when a=15/
Liono4ka [1.6K]

Answer:

b = 125

Step-by-step explanation:

Given a varies directly as \sqrt[3]{b} then the equation relating them is

a = k\sqrt[3]{b} ← k is the constant of variation

To find k use the condition a = 3 , b = 64 , then

3 = k\sqrt[3]{64} = 4k ( divide both sides by 4 )

\frac{3}{4} = k

a = \frac{3}{4} \sqrt[3]{b} ← equation of variation

When a = \frac{15}{4} , then

\frac{15}{4} = \frac{3}{4} \sqrt[3]{b} ( multiply both sides by 4 to clear the fractions )

15 = 3\sqrt[3]{b} ( divide both sides by 3 )

5 = \sqrt[3]{b} , then

b = 5³ = 125

6 0
2 years ago
How long is the postar
fiasKO [112]

Well, since the area is 504. ANd the width is 14.

You do 504 divided by 14. Which is 36.


The poster is 36 centimeters.

The equation is 504/14=x

x=36

7 0
2 years ago
Evaluate: - (- 8) + (- 5) - (- 1) - (- 3) - (- 2) hurry plz!!!!!!!
zvonat [6]

9

(did i do it quickly enough?)

3 0
3 years ago
Find the length of each missing side and each missing angle in the isosceles triangles below
goldenfox [79]

Answer:

x = 5

y = 46

z = 88

Step-by-step explanation:

x  is opposite one of the equal base angles. The other side is marked 5. Therefore x = 5

y is opposite one of the equal sides. It is an angle. It is equal to the other base angle whose measurement is given. y = 46

y + 46 + z = 180                   All triangles have 180 degrees. y = 46 (above)

46 + 46 + z = 180

92 + z = 180                        Subtract 92

z = 180 - 92

z = 88

4 0
2 years ago
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