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3 years ago

O triplo de um mumero somado a 9 e igual a 30 .qual e esse numero

Mathematics

1 answer:

-Dominant- [34]3 years ago

7 0

Do you think than i ve understood it right

3x+9=30

3x=21

x = 21/3 = 7

x = 7

hope helped

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In sentences why can’t x^2+2x+12 cannot be factored

tamaranim1 [39]

$x^2+2x+12$

This cannot be factored because you can'y take a number out.

This is factoring. $6x^2+4x+10=2(3x^2+2x+5)$

This is not factoring. $x^2+5x+96=1(x^2+5x+96)$

Hope this helps. :)

5 0

2 years ago

The height of a trapezium of area 162 cm^2 is 6cm. if one of the base is 23 cm. find the other

Luden [163]

Answer:

31 cm

Step-by-step explanation:

The area (A) of a trapezium is calculated as

A = $\frac{1}{2}$ h (a + b)

where h is the height and a, b the bases

Here A = 162, h = 6 and a = 23 , then

$\frac{1}{2}$ × 6 (23 + b) = 162

3(23 + b) = 162 ( divide both sides by 3 )

23 + b = 54 ( subtract 23 from both sides )

b = 31

The other base is 31 cm

6 0

2 years ago

Help Asap !

Paha777 [63]

A is the true statement because the variable g us counted as 1 so then we subtract 6 from 1 =5g

6 0

3 years ago

Hey, can you help me out here (please)?

FinnZ [79.3K]

In the x quarts of 2% fat milk, there is 0.02x quarts of fat.
in the y quarts of 4% fat milk there is 0.04y quarts of fat.
together, there is (x+y) quarts of milk, and 0.24 quarts of fat.
the equations are:
x+y=9
0.02x+0.04y=0.24
multiply the first equation with 0.02: 0.02x+0.02y=0.18
subtract this new equation from equaition 2 to eliminate x:
0.04y-0.02y=0.24-0.18
0.02y=0.06
y=3
x=9-3=6
x is twice as much as y.
He used twice as much as the 2% fat milk than the 4% fat milk.
so the first choice is the correct answer.

8 0

2 years ago

15.2x2 + 6x2 is it simplified<br>

tresset_1 [31]

Answer:

No, it is not simplified

Let's Simplify :

<h3>Step-by-step explanation:</h3>

$15.2 \times 2 + 6 \times 2 \\ =30 .4 + 12 \\ =4 2.4$

8 0

3 years ago