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
Lisa [10]
3 years ago
7

the sum of the ages of Petra and her mother is 45. her mothers is 6 years more than twice as old as Petra. how old are Petra and

her mother?
Mathematics
1 answer:
otez555 [7]3 years ago
4 0
Petra is 13 and her mother is 32. I used this equation:
p + 2p + 6 = 45
if you solve for p, you get 13. 13 times 2 plus 6 equals 32. So her mother is 32.
You might be interested in
Giant spider crabs prefer an elevation of around -800 feet, and Atlantic wolffish prefer an elevation of around -300 feet.
Zepler [3.9K]
Giant spider crabs tend to be farther from the surface of the ocean than Atlantic wolffish
8 0
3 years ago
Please help i beg i never get these right
Anuta_ua [19.1K]

Answer:

\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}

Step-by-step explanation:

Given

\sin(105^o)

Required

Solve

Using sine rule, we have:

\sin(A + B) = \sin(A)\cos(B) + \sin(B)\cos(A)

This gives:

\sin(105^o) = \sin(60 + 45)

So, we have:

\sin(60 + 45) = \sin(60)\cos(45) + \sin(45)\cos(60)

In radical forms, we have:

\sin(60 + 45) = \frac{\sqrt 3}{2} * \frac{\sqrt 2}{2} + \frac{\sqrt 2}{2} * \frac{1}{2}

\sin(60 + 45) = \frac{\sqrt 6}{4} + \frac{\sqrt 2}{4}

Take LCM

\sin(60 + 45) = \frac{\sqrt 6 + \sqrt 2}{4}

Rewrite as:

\sin(60 + 45) = \frac{\sqrt 2 + \sqrt 6}{4}

Hence:

\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}

3 0
2 years ago
What geometric<br> constructions can have a<br> perpendicular bisector?
Andrews [41]

Answer:

A perpendicular bisector of a line segment is a line segment perpendicular to and passing through the midpoint of (left figure). The perpendicular bisector of a line segment can be constructed using a compass by drawing circles centered at and with radius and connecting their two intersections.

5 0
3 years ago
The equation y=x^2-12x+45 models the number of books y sold in a bookstore x days after an award-winning author appeared at an a
romanna [79]
Answer: The first day the author reaches 100 days is on day 16.

To solve this problem, you could use a graphing calculator to graph the given equation. Then, determine when this line crosses 100. It crosses when x = 15.539. Therefore, we would have to round up to 16 so it is at least 100.

You could use the quadratic equation to solve: 100 = x^2 -12x + 45

Either you will get 16. If you use the quadratic formula, make sure to only use the positive answer.
7 0
3 years ago
the length of a rectangle is 7 inches greater than three times its width write an expression to represent its area
icang [17]

Step-by-step explanation:

Let the length be L.

Let the breath be B.

So, we are given that

length of a rectangle is 7 inches greater than three times its width .

So, according to the Question,

L = 7+ 3B.

So, we know that:-

Area = Length× Breadth.

So, it will be

B × (7 + 3B) = Area.

So,

3B² + 7 is an expression to represent its area.

3 0
3 years ago
Other questions:
  • Question 9(Multiple Choice Worth 1 points) (01.06 LC) Solve x -5y = 6 for x.​
    14·1 answer
  • -x- y=-4<br> -2x+y=-5<br> How do you it for solving eliminating
    15·1 answer
  • Multiple Choice: Please select the best answer.
    10·2 answers
  • Solving Problems with Unit Rates - Item 1097
    14·2 answers
  • Can someone help me with Surface area?
    15·1 answer
  • In the given figure, if AOB is a straight line, then ∠BOC is
    7·2 answers
  • Question 8 of 10
    9·1 answer
  • Please help ASAP!!!Explain how to solve the problem if u can
    7·1 answer
  • A health club charges a one-time sign-up fee and a monthly membership fee. The equation y=30x+40 represents what the health club
    5·1 answer
  • Solve: – 17 &lt; 2x – 3 &lt; 5<br> -<br> Give your answer as an interval.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!