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Step2247 [10]
3 years ago
10

Elizabeth had 12 stamps. she decided to write letters to some of her relatives. after she sent her letters, she had 4 stamps lef

t. how many letters did she mail?
Mathematics
2 answers:
aev [14]3 years ago
4 0
All we have to do here is 12-4 which would leave us with 8 hope this helped
mr_godi [17]3 years ago
3 0
She sent 8 letters 12-4=8
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The height of a triangle is 2 less than 5 times its base. If the base of the triangle is x feet, and the area of the triangle is
Gnesinka [82]

Answer:

A. 5x^2 − 2x − 24 = 0

Step-by-step explanation:

height = 5b-2

b =x

We can rewrite the height as

h = 5x-2

We know the formula for area of a triangle

A = 1/2 bh

A =1/2 x * (5x-2)

Distributing the x

A=    1/2 (5x^2 - 2x)

We know A =12

12 = 1/2 (5x^2 - 2x)

Multiply each side by 2

12*2 = 2*1/2 (5x^2 - 2x)

24 = 5x^2 - 2x

Subtract 24 from each side

24-24 = 5x^2 - 2x-24

0 = 5x^2 - 2x-24

6 0
3 years ago
Keith used the following steps to find the inverse of f, but he thinks he made a error
astra-53 [7]

Answer:

Step-by-step explanation:

\Large \boldsymbol{} f(x)  \ \ inverse  \ \  function    \ \ (f(x))^{-1} \\\\ y=7x+5 \\\\x=7y+5 \\\\ y=\dfrac{x-5}{7}  \ \  or \  \  f(x)^{-1}= \dfrac{x-5}{7}

7 0
2 years ago
Show your work please.
Kruka [31]

Answer:

Tauren has 78 keychains

James has 34 keychains

Marcus has 68 keychains

Yahya has 74 keychains

Step-by-step explanation:

I got this answer by doing this:

If Tauren has 78 keychains then its gonna be left like that.

If everybody else has an average of 68 keychains then divide 68 by 2 to get half of what marcus has which equals 34.

Then add the amount of James and marcus keychains which is 68 plus 34 which equals 102, the subtract the 28 because it says Yayha has 28 fewer keychains and that equals 74.

3 0
3 years ago
The sum of 4 consecutive odd numbers is 40.<br> What is the second number in this sequence?
Tcecarenko [31]

Answer:

7,9,11,13 = 40

Step-by-step explanation:

second number is 9

7 0
3 years ago
Read 2 more answers
5x-5=3x +17<br> what is the answer?
Ratling [72]

Answer:

5x-5=3x +17 So were solving for x The answer would be =11

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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