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Andrew [12]
3 years ago
9

Of the books on a shelf, 2/3 are mysteries. If there are 10 mystery books, how many are on the shelf

Mathematics
1 answer:
masha68 [24]3 years ago
4 0
There are 15 mystery books are on the shelf
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A DVD that originally cost $30 is on sale for 10 percent off. Complete the steps to solve the problem
Wittaler [7]

Answer:

3$

Step-by-step explanation:

the discount is 27 so that leaves 3 dollars if

30-27=3 ^^

8 0
3 years ago
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Solve the equation. Check your solution.<br> 3x+4x-8=6<br> x= <br> ​(Simplify your​ answer.)
KengaRu [80]

Answer:

<h2>x=2</h2>

Step-by-step explanation:

Isolate x

3x + 4x - 8 = 6

             +8    +8

3x + 4x = 6 + 8

Simplify

3x + 4x = 6 + 8

7x = 14

Divide both sides by 7

7x/7 = 14/7

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6 0
3 years ago
Convert 13pi/6 to a degree measure <br><br> A=390<br> B=2450.44<br> C=30<br> D=780
Burka [1]

Answer:

390 degrees

Step-by-step explanation:

The conversion factor is 180/pi

13 pi /6 * 180/pi

13/6 *180

390

5 0
3 years ago
together,sarah's two cats have the same mass as her dog,11 kg.the mass of one cat is 1500 g greater than the mass of the other.
Alika [10]
Let (a) be the first cat
let (b) be the second cat
a +b=11kg-----(1)
a=b+1500g⇒(1.5 kg)-------(2)
so now u have a system of two unknowns
a=11-b
substitute a in (2)
11-b=b+1.5
11-1.5=2b
2b=9.5
b=9.5/2=4.75
subs. b in (1)
a+b=11
a+4.75=11
a=11-4.75=6.25
so cat (a) is 6.25 kg
and (b) is 4.75 kg
hope I helped



6 0
3 years ago
The floor of the entryway to an office building will be tranglar. Twi angles will measure 40 and the side between them will have
Hoochie [10]

Answer:

n

Step-by-step explanation:n

4 0
3 years ago
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