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
gayaneshka [121]
2 years ago
13

( x + 30 ) ( x + 40 ) solve for x

Mathematics
2 answers:
PolarNik [594]2 years ago
7 0

Answer:

Step-by-step explanation:

(x+30)(x+40)

X(x+40) +30(X+40)

X²+40x+30x+1200

X²+70x+1200

by applaying quadrtic fromula we get

a=1, b=70, c=1200

(-b ± √(b2 − 4ac))/(2a)

put the values

(-70±√(70)²-4(1)(1200)/2(1)

(-70±√4900-4800)/2

(-70±√100)/2

(-70±10)/2

either                                       or

-70+10/2                                    -70-10/2

-60/2                                             -80/2

-30                                                   -40

so x={-30,-40}

vazorg [7]2 years ago
5 0

Answer:

X^2 + 70x + 12000

Step-by-step explanation:

Is that what you wanted? I got that by using the distributive method.  

You might be interested in
I need help with number 30
yanalaym [24]

Answer:

220

Step-by-step explanation:

5 0
3 years ago
To repair computers, Computer
NeTakaya
Difference in base price — $200–$125=$75
Difference in hourly charge — $18–$12=$5
Number of hours for which computer repair shop will cost the same = 75/5
=15 Hours
3 0
2 years ago
Read 2 more answers
Suppose an airline policy states that all baggage must be box shaped with a sum of​ length, width, and height not exceeding 114
NISA [10]

Answer:

Step-by-step explanation:

Represent the length of one side of the base be s and the height by h.  Then the volume of the box is V = s^2*h; this is to be maximized.

The constraints are as follows:  2s + h = 114 in.  Solving for h, we get 114 - 2s = h.

Substituting 114 - 2s for h in the volume formula, we obtain:

V = s^2*(114 - 2s), or V = 114s^2 - 2s^3, or V = 2*(s^2)(57 - s)

This is to be maximized.  To accomplish this, find the first derivative of this formula for V, set the result equal to 0 and solve for s:

dV

----- = 2[(s^2)(-1) + (57 - s)(2s)] = 0 = 2s^2(-1) + 114s - 2s^2

ds

Simplifying this, we get dV/ds = -4s^2 + 114s = 0.  Then either s = 28.5 or s = 0.

Then the area of the base is 28.5^2 in^2 and the height is 114 - 2(28.5) = 57 in

and the volume is V = s^2(h) = 46,298.25 in^3

7 0
3 years ago
Round 1,129.872 to the nearest hundred
sp2606 [1]
1,129.872 to the nearest hundred is 1,100
3 0
3 years ago
Read 2 more answers
A concrete mix is designed to withstand 3000 pounds per square inch​ (psi) of pressure. The following data represent the strengt
ss7ja [257]

Answer:

Mean = 3640

Mode = 4100

Median = 3830.

Step-by-step explanation:

We are given the following data in the question:

Strength of casts (in psi):

3970,4100,3100,3200,2950,3830,4100,4050,3460

Formula:

Mean = \displaystyle\frac{\text{Sum of all observation}}{\text{Total number of observations}}

\displaystyle\frac{3970+4100+3100+ 3200+ 2950+ 3830+4100+ 4050+ 3460}{9} = \displaystyle\frac{32760} {9} = 3640

Mode is the entry with most frequency. Thus, for the given sample mode = 4100.

Median

Since n = 9 is odd,

Formula:

Median = \displaystyle\frac{n+1}{2}th~term

Data in ascending order:

2950,3100,3200,3460,3830,3970,4050,4100,4100

Median = 5th term = 3830.

7 0
3 years ago
Other questions:
  • How do i solve 14x-2=8x+6 (11+x)
    14·1 answer
  • Sea World has 9 aquariums with small fish in them and the number of fish in each tank are shown below: 45, 10, 48, 19, 36, 25, 6
    15·1 answer
  • Is This Answer Correct (A)
    12·1 answer
  • Frankie is practicing for a 5-kilometer race. His normal time is 31 minutes 21 seconds. Yesterday it took him only 29 minutes 38
    7·2 answers
  • Which law would you use to simplify the expression
    9·2 answers
  • What is the probability of being born on a day that does not begin with the letter T?
    13·1 answer
  • Plz i need the answer today
    6·2 answers
  • Question 8 thank youuu
    15·2 answers
  • 1) Functions A, B and C are all linear functions ofx. Rank the rates of change and the y-intercepts of all three from smallest t
    5·1 answer
  • Quadratic<br><br> 4x2+8x+27=88
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!