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sergey [27]
3 years ago
11

Which number line model represents the expression -2+(-7)? Khan academy help!!!!!

Mathematics
1 answer:
gtnhenbr [62]3 years ago
6 0
-9 because 2+7=9 so the negative part oh then must be -9
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Jamie kept track of the total hours and minutes she worked this week at the local health food store.
ziro4ka [17]

Answer:

18.05

Step-by-step explanation:

3 0
2 years ago
In a triangle CAT, we have m∠ACT = m∠ATC, m∠CAT = 36°. If TR bisects ∠ATC, then ∠CRT= A.36° B.54° C.72° D.90° E.108°
kirza4 [7]

Check the picture below.

5 0
3 years ago
Josh is trying to factor the expression
mrs_skeptik [129]

Answer:

a) Josh likely made the negative and positive multiplication error.

b) -20a-8+12b

= -4(5a+2-3b)

Step-by-step explanation:

To check if you are correct, you can always simplify it again:

-4(5a+2-3b)

=-20a-8+12b

Remember:

Negative times negative equals to positive, negative times positive equals to negative!

I hope this is helpful! :)

4 0
2 years ago
A graduated cylinder is filled with 20ml of water. Then, an 8g marble is dropped into the cylinder, causing the volume to change
Tema [17]

Answer:

The density of the marble is 2,000 kg/m³

Step-by-step explanation:

The given parameters for finding the density of the marble are;

The volume of water in the graduated cylinder, v₁ = 20 ml

The mass of the marble dropped into the graduated cylinder, m = 8 g

The new volume of the cylinder after the 8 g marble is dropped into the cylinder, v₂ = 24 ml

Therefore, the volume of the marble, v = v₂ - v₁

Substituting the known values gives;

The volume of the marble, v = 24 ml - 20 ml = 4 ml

Density, ρ = Mass, m/(Volume, v), the units of density is kg/m³

Therefore, the density of the marble, \rho _{marble}, is given as follows;

\rho _{marble} = m/v = (8 g)/(4 ml) = 2 g/ml

1 g/ml = 1 kg/l = 1,000 kg/m³

∴ \rho _{marble} = 2 kg/l = 2,000 kg/m³.

4 0
3 years ago
I need help on all 3
a_sh-v [17]

Answer:

i think answer for 3 is,

3x+1=100

3x=99

x=33°

6y-16+5y-2=180

11y-18=180

11y=198

y=18°

8 0
3 years ago
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