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Mathematics

1 answer:

SIZIF [17.4K]3 years ago

4 0

Answer:

-15u²

Step-by-step explanation:

$-(4+11)u^{2} \\-15u^{2}$

same exponent so it can be added together

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If no digit can be used more than once in a number, how many 2 digits numbers can be formed using only the digits 7, 1, 3, and 9

joja [24]

Hey there!

What I would do to solve this problem is list out all four of the numbers, then place the other three numbers behind it, like so:

71
73
79
17
13
19
37
31
39
97
91
93

These are all of your possible combinations without any repeats. There's a total of 12 possible combos.

Hope this helped you out! :-)

3 0

3 years ago

Read 2 more answers

7(C - 18)= -98 Help ASAP

Harlamova29_29 [7]

Answer:

$C=4$

Step-by-step explanation:

$7(c-18)=-98\\7c \frac{-126}{+126}=\frac{-98}{+126} \\\frac{7c}{7}=\frac{28}{7}\\c=4$

3 0

3 years ago

Please help i have a F in math and me is confused.

alexandr402 [8]

Answer:

Complementary, 65°

Step-by-step explanation:

» They are complementary angles.

${ \tt{x + 25 = 90}} \\ { \tt{x = 90 - 25}} \\ { \tt{x = 65 \degree}}$

7 0

2 years ago

Calculate the value of (6.72 10^5)+ (3.2 x 10^4) Give your answer in standard form.

dangina [55]

Answer:

$7.04\cdot 10^{5}$ or 704,000

Step-by-step explanation:

Standard Form of Numbers

Any number that we can write as a decimal number between 1.0 and 10.0, multiplied by a power of 10, is said to be in Scientific Notation. Some authors consider standard form and scientific form as the same, but others state that standard form is the common form of expressing numbers, i.e., a sequence of digits, separated by thousands by a comma, and separated from the decimal part by a dot.

We'll give here both answers.

We have to calculate:

$6.72\cdot 10^{5}+3.2\cdot 10^{4}$