1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alexandr1967 [171]
3 years ago
13

Use mental math to solve the equation w - (-3) = 7 please help

Mathematics
1 answer:
tester [92]3 years ago
8 0

w-(-3)=7

Pretend that there is a -1 in front of the bracket

w-1(-3)=7

Mutiply the bracket by -1

(-1)(-3)=3

w+3=7

Move +3 to the other side. Sign changes from +3 to -3.

w+3-3=7-3

w=4

Answer: w=4

You might be interested in
Which of the following is a polynomial with roots negative square root of 5, square root of 5, and 3?
Alex Ar [27]

Answer:

x^{3}-3x^{2}-5x+15

Step-by-step explanation:

The roots of the given polynomial are: -\sqrt{5}, \sqrt{5}, 3

Since, -\sqrt{5}, \sqrt{5}, 3 are the roots of the polynomial, according to the factor theorem, (x - (-\sqrt{5})), (x-\sqrt{5}), (x-3) would be the factors of the polynomial.

Since we have the factors of the polynomial, we can multiply them to get the desired polynomial.

Let the polynomial be represented by P(x), so

P(x) = (x - (-\sqrt{5}))(x-\sqrt{5})(x-3)\\\\ P(x)=(x +\sqrt{5})(x-\sqrt{5})(x-3)\\\\ P(x)=(x^{2}-(\sqrt{5} )^{2})(x-3)\\\\ P(x)=(x^{2}-5)(x-3)\\\\ P(x)=x^{3}-3x^{2}-5x+15

The polynomial represented by P(x) has the given roots.

5 0
3 years ago
Translate in an equation but do not solve.<br>sixty-eight is twelve less than x
belka [17]
X = 12 + 68.

If 68 is 12 less than x, then we should add 12 to 68 to get x.
5 0
3 years ago
Which of the following numbers is the arithmetic mean for the other<br> numbers? <br> 26,28,29,30,37
yKpoI14uk [10]

Answer:

to find the answer we have add all the numbers given then divide by number of items

Step-by-step explanation:

26+28+29+30+37= 150

as there are 5 numbers we divide 150/5=30

there for the arithmetic mean for the other numbers is 30

hope you understood

7 0
3 years ago
Suppose the heights of 18-year-old men are approximately normally distributed, with mean 72 inches and standard deviation 4 inch
k0ka [10]
(a) 0.1974
(b) 0.7695

5 0
4 years ago
Read 2 more answers
What is the perimeter of the rectangle in the coordinate plane?
kenny6666 [7]

Answer:

38

Step-by-step explanation:

5+5=10+14+14=38

7 0
3 years ago
Other questions:
  • 1. Kaly can select from 5 types of candies and 4 types of chocolates . If she randomly selects 1 chocolate and 1 candy, how many
    15·1 answer
  • Simplify the expression 5x(-2x+4) - (-7)
    10·1 answer
  • How would you find the square root of a number? How would you use it?
    6·1 answer
  • Toysrus is having a 38% off sale. If a backpack normally costs $22, how much will it cost on sale
    9·1 answer
  • Which of the following appear in the diagram below?
    15·1 answer
  • What is 240 milimeters to cubic centimeters
    6·2 answers
  • If quinn tosses a fair coin and then rolls a fair number cube labeled 1 through 6, what is the probability of tossing heads foll
    5·1 answer
  • The dimensions of an ancient Egyptian rug are 6 feet by 8 feet. Priscilla is creating a drawing of the rug with the scale 4 cm =
    5·1 answer
  • Solve each system by graphing (PLEASE HELP)
    14·1 answer
  • PLEASE HELP I"LL MARK BRAINLIEST!!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!