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
IgorC [24]
3 years ago
13

A bridge is 28 meters long. Find the length of a scale model if the scale is 1 : 550

Mathematics
1 answer:
Vlada [557]3 years ago
3 0

Answer:

0.05090909 meters

Step-by-step explanation:

28 is to p as 550 is to 1

is what you should ask yourself

so 550 times p equals 28 times 1 (crossmultiplying)

550p=28

now divide 28 by 550 to find p, the length of the scale model

=0.05090909

You might be interested in
Solve equation by using the quadratic formula.
Sati [7]

Answer: 1:  x=3, x=1

2:  x= -5

3:  There are 2 real solutions.

4:  There are 2 real solutions.

5:  There are no real solutions.

6.  There is 1 real solution.

7.  

8.  x= -6, x = -2

9.  x = -1/6, x=1

10.  

Explanation:

1.  The quadratic formula is

Substituting our known information we have:

2.  Rewriting the quadratic in standard form we have x²+10x-25=0. Substituting this into the quadratic formula gives us:

3.  The discriminant is b²-4ac.  For this problem, that is 20²-4(-4)(25)=400--400=800.  Since this is greater than 0, there are 2 real solutions.

4.  The discriminant in this problem is 7²-4(2)(-15)=49--120=49+120=169.  This is greater than 0, so there are 2 real solutions.

5.  The discriminant in this problem is 1²-4(-2)(-28)=1-224=-223.  Since this is less than 0, there are no real solutions.

6.  If the discriminant of a quadratic is 0, then by definition there is 1 real solution.

7.  Rewriting the quadratic we have 3x²-4x-2=0.  Using the quadratic formula we have:

8.  Factoring this trinomial we want factors of 12 that sum to 8.  6*2 = 12 and 6+2=8, so those are our factors.  This gives us:

(x+6)(x+2)=0

Using the zero product property we know that either x+6=0 or x+2=0.  Solving these equations we get x= -6 or x= -2.

9.  Factoring this trinomial we want factors of 6(-1)=-6 that sum to -5.  (-6)(1)=-6 and -6+1=-5, so this is how we "split up" the x term:

6x²-6x+1x-1=0

We group together the first two and the last two terms:

(6x²-6x)+(1x-1)=0

Factor the GCF out of each group.  In the first group, that is 6x:

6x(x-1)+(1x-1)=0

In the second group, the GCF is 1:

6x(x-1)+1(x-1)=0

Both terms have a factor of (x-1), so we can factor it out:

(x-1)(6x+1)=0

Using the zero product property, we know either x-1=0 or 6x+1=0.  Solving these equations we get x=1 or x=-1/6.

10.  Substituting our information into the quadratic formula we get:

Step-by-step explanation:

5 0
2 years ago
Compute the probability of tossing a six-sided die (with sides numbered 1 through 6) and
goblinko [34]

Answer:

the answer is 1 in 6 odds.

4 0
3 years ago
Please answer !!!!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!!!!!!!
xxTIMURxx [149]
Since it is a right angle you would subtract 57 from 90 because both angles added together are 90°. 90-57= 33°
8 0
3 years ago
Pls help ill mark brainliest!:) thank you<3
murzikaleks [220]

Answer:

(-26, 32)

Step-by-step explanation:

6 0
3 years ago
Need help please i will give you five stars if you hlep
Rainbow [258]

Answer:

96 inches

Step-by-step explanation:

We can write a proportion to solve

60 inches          x inches

--------------- = -------------

5 ft                       8 ft

Using cross products

60 *8 = 5x

480 = 5x

Divide by 5

480/5 = 5x/5

96 = x

96 inches

3 0
2 years ago
Read 2 more answers
Other questions:
  • Dentro de 15 años la edad de Jorge será el doble de la de Eduardo si hace 6 años la de Jorge era triple la de Eduardo, hallar la
    8·1 answer
  • Solve the equation for y <br> -2x+y=11
    6·2 answers
  • Solve for x.<br> 2x+3≤x−5<br>  <br><br><br> x≤8<br><br> x≤−2<br><br> x≤−8<br><br> x≤2
    12·2 answers
  • What is another fraction for,4/8?
    13·2 answers
  • How do I solve the equation.×-8=4 can you help me with step by steps on this please
    8·2 answers
  • John and Ndiba each improved their yards by planting rose bushes and geraniums. They bought
    8·1 answer
  • What must be a factor of the polynomial function f(x) graphed on the coordinate plane below?
    6·1 answer
  • Solve the percent problem 76 gallons is 126% of ___ gallons. Round to the nearest hundredth, if necessary.
    6·1 answer
  • What is the surface area of a cylinder with base
    11·1 answer
  • A coupon subtracts $17.95 from the price p of a pair of headphones. You pay $71.80 for the headphones after using the coupon. Wr
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!