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Ira Lisetskai [31]
3 years ago
11

What do you do to solve a problem that has just a negative in front of the parentheses?

Mathematics
1 answer:
Sveta_85 [38]3 years ago
4 0
If there is a negative symbol in front of the parentheses, it indicates that you must multiply what's inside the parentheses by -1 (if you only have a negative symbol in front of it) or multiply it by whatever negative number is provided.
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Lisa had 1750 stamps. Mark had 480 fewer stamps than Lisa. Lisa gave some stamps to Mark. Now Mark has three times as many stamp
FrozenT [24]
L: 1750, M:1750-480=1270
Lisa gave some stamps to Mark so Lisa now has 1750-x and Mark has 1270+x. Mark also has 3 times as many as Lisa now: (1750-x)*3=1270+x
5250-3*x=1270+x
4*x=3980, x=3980/4, x=995
So Lisa gave 995 stamps to Mark.
At first Mark had 1270 stamps. Lisa now has 1750-995=755 stamps.
7 0
3 years ago
Read 2 more answers
29. Which of the following expressions will result in a real answer after being simplified? Select all that apply.
nexus9112 [7]

Answer: A, B, C, and E

Step-by-step explanation:

If both sides are real numbers, then the product will be a real number.

If in at least one of the sides we have a complex number, then the product will be real if:

The other number is zero.

The other number is the conjugate of the first.

This is when:

Suppose we have a number:

z = a + b*i

The conjugate will be:

w = a - b*i

And the product between them is:

(a + b*i)*(a - b*i) = a^2 + a*b*i - a*b*i + b^2 = a^2 + b^2

Then the options that will have a real answer are:

A. (4+5i)(4-5i) = 4^2 + 5^2 = 16 + 25 = 41

B. (4 + 91)*(41 - 9) = 3040

C. (3 + 2*i)*(3 -2*i) = 3^2 + 2^2 = 9 + 4 = 13

E. (312 + 7i)*(312 - 7i) = 312^2 + 7^2 = 97,393

5 0
3 years ago
Which equation is equivalent to x^2 - 16x + 49 = 0?
goblinko [34]
Subtract 49 by its negative so now
x^2-16x=-49
then move -16 so
x^2=-49+16x
then add -49 and 16 so then you get
X^2+your answer)
then find the square root because this was in exponential form so find the square root of x^2 and of your answer so
X= Your answer
 do the work
3 0
3 years ago
73 divided by the difference between 12 and seven rewrite in number sentence
nignag [31]
73<span>÷12-17

Difference means subtraction. </span>
4 0
3 years ago
Ella bought some keychains and spent a total of $24 each she can cost the same whole dollar amount. How many she bought between
lesya [120]

Answer:

8

Step-by-step explanation

Find the factors of 24

1,2,3,4,6,8,12,24

find the number that is in the range of 7 and 11

5 0
3 years ago
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