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
Anarel [89]
3 years ago
7

Question 3 and 5 please ASAP!

Mathematics
1 answer:
wlad13 [49]3 years ago
3 0

Step-by-step explanation:

a=<u>bx + cx</u>

2

2*a=<u>x(b+c)</u>*2

2

<u>2a</u> = <u>x(b+c)</u>

(b+c) (b+c)

<u>2a</u> = x

(b+c)

You might be interested in
Check all that apply.<br> x2 + 4x - 9 = 5x + 3
kakasveta [241]

Answer:

The solution set is (-3, 4).

Step-by-step explanation:

x2 + 4x - 9 = 5x + 3

x^2 + 4x - 5x - 9 - 3 = 0

x^2 -x - 12 = 0

(x - 4)(x + 3) = 0

x = -3, 4.

8 0
3 years ago
When Lorenzo finished his exam last week, he thought the test was over. But the instructor put z-scores on each student's paper
Anarel [89]

Answer:

Lorenzo's score on exam was 75.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 61

Standard Deviation, σ = 8

We are given that the distribution of test score is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

z-score = 1.75

We have to find the value of x.

Putting values, we get

1.75 = \dfrac{x - 61}{8}\\\\x = 1.75(8) + 61\\x = 75

Thus, Lorenzo's score on exam was 75.

5 0
3 years ago
»<br> Evaluate<br> 4 a + 3 b<br> when a = 3 and b= -1.2<br> 4 (3) + 5 (-1.2)
DedPeter [7]

Answer:

6

Step-by-step explanation:

4 a + 3 b

when a = 3 and b= -1.2

4 (3) + 5 (-1.2)

12 + -6

6

8 0
3 years ago
Read 2 more answers
Factorise:2x^4+x^3-14x^2-19x-6
tester [92]

Answer:

(x+1)(2x+1)(x+2)(x−3)

Step-by-step explanation:

Factor 2x^4+x^3−14x^2−19x^−6

2x^4+x^3−14x^2−19x^−6

=(x+1)(2x+1)(x+2)(x−3)

6 0
3 years ago
He Earth completely rotates on its axis once every 24 hours.
mafiozo [28]

Answer:

A)

58/3 = 19.33 hours

B)

84.00 hours

C)

2074.29 miles

Step-by-step explanation:

Under the assumption the earth is a perfect circle, then in a complete rotation ( 24 hours) the earth will rotate through  360 degrees or 2π radians.

A)

In one day or 24 hours the earth rotates through 360 degrees. We are required to determine the duration it takes to rotate through 290 degrees. Let x be the duration it takes the earth to rotate through 290 degrees, then the following proportions hold;

(24/360) = (x/290)

solving for x;

x = (24/360) * 290 = 58/3 = 19.33 hours

B)

In 24 hours the earth rotates through an angle of 2π radians. We are required to determine the duration it will takes the Earth to rotate through 7π radians. Let x be the duration it takes the earth to rotate through 7π radians, then the following proportions hold;

(24/2π radians) = (x/7π radians)

Solving for x;

x = (24/2π radians)*7π radians = 84 hours

C)

If the diameter of the earth is 7920 miles, then in a day or 24 hours a point on the equator will rotate through a distance equal to the circumference of the Earth. Using the formula for the circumference of a circle;

circumference = 2*π*R = π*D

                         = 7920*3.142

                         = 24891.43 miles

Therefore a point on the equator covers a distance of 24891.43 miles in 24 hours. This will imply that the speed of the earth is approximately;

(24891.43miles)/(24 hours) = 1037.14 miles/hr

The distance covered by the point in 2 hours will thus be;

1037.14 * 2 = 2074.29 miles

7 0
3 years ago
Other questions:
  • Carter drawers one side of equilateral triangle pqr on the coordinate plane at points P(-3, 2) and Q(5, 2). Which ordered pair i
    8·1 answer
  • How do I find the perimeter of a triangular pyramid with a base edge 6
    15·1 answer
  • (4)(5) Please help Geo
    15·1 answer
  • Please answer and explain why.
    7·1 answer
  • Which ordered pair is a solution of the equation y-3=5(x-2)
    9·1 answer
  • How do I multiply whole fractions
    9·1 answer
  • What is the value of f(x) = –x2 – 2 when x = –1?
    8·1 answer
  • Hayden bought 48 new trading cards. Three fourths are baseball cards. How many baseball cards Hayden buy?
    15·1 answer
  • The ratio of boys to girls is 2 to 5 if they're 80 girls how many boys are there
    13·1 answer
  • SCIENCE QUESTION BUT I HAD TO PUT IN MATH - I WILL GIVE BRAINLIEST TO CORRECT ANSWER
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!