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Maksim231197 [3]
3 years ago
10

:D plz help with my math i dont understand this

Mathematics
2 answers:
snow_tiger [21]3 years ago
7 0
4. is 7/10
5. 1/5
7. 1/2
3. 1/3
Sorry if I’m wrong
Mashutka [201]3 years ago
4 0
I didn’t understand it when I was in middle school either but for number 5 it’s C RESPECKFULLY
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If a = 3, solve the expression 3a + 6 +5a.​
Tanya [424]

Answer:

3a+6+5a

3×3+6+5×3

9+6+15

15+15

30

3 0
3 years ago
Use expressions for odd integers to confirm the conjecture that the product for two odd integers is an odd integer.
Mandarinka [93]

k, n - integers  

2k+1  - an odd integer

2n+1  - another odd integer

The product of them:

  (2k + 1)(2n + 1) =

= 4kn + 2k + 2n + 1 =

= 2(2kn + k + n) + 1

The product of integers (2kn) is integer

and the sum of them (2kn+k+n) also is integer

So  (2k + 1)(2n + 1)  = 2(2kn + k + n) + 1  is an odd integer

4 0
4 years ago
In a jar of marbles 9 out of 15 marbles are purple. Of there are 400 marbles in the jar, how many of th are not purple?
kramer

Answer:

C) 160

Step-by-step explanation:

Set up a proportion:

\frac{9}{15} = \frac{x}{400}

Cross multiply and solve for x:

15x = 3600

x = 240

This means in 400 marbles, 240 are purple.

To find how many are not purple, subtract 240 from 400:

400 - 240

= 160 marbles

So, 160 marbles are not purple

7 0
3 years ago
Graph 5X minus 4Y equals 20
max2010maxim [7]
There are website were you can do that u know
7 0
3 years ago
Minimize Q=3x2+3y2​, where x+y=6.
weeeeeb [17]

Answer:

+(x + y) {}^{2}  = 6 {}^{2} \\ x {}^{2} + 2xy + y {?}^{2}  = 36

x {}^{2}  + y {}^{2}  = 36 - 2xy

q = 3(x {}^{2}  + y {}^{2} )

q = 3(36 - 2xy) = 108 - 6xy

5 0
3 years ago
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