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
Aleks04 [339]
3 years ago
12

Please help I’ll give brainliest

Mathematics
1 answer:
SSSSS [86.1K]3 years ago
8 0

Answer:

B

Step-by-step explanation:  6 21  9 45

49 × 17 + 49 × 3

49 × (17 + 3)

49 × 20

You might be interested in
A small metal bar, whose initial temperature was 10° C, is dropped into a large container of boiling water. How long will it tak
IgorC [24]

Answer

According to newton law of cooling

\dfrac{d T}{dt} = k (T - T_a)

and

T = Ce^{kt} + T_a

now At Ta = 100

T₀ = 10 °C

T₁ = 12° C

T(0) = Ce^{0} + T_a

10 = C + 100

C = -90

now,

12 = -90e^k + 100

e^k = \dfrac{88}{90}

k = ln{\dfrac{88}{90}}

at time equal to t

T(t) = 70

T(t) = -90 (\dfrac{88}{90})^t + 100

70 = -90(\dfrac{88}{90})^t + 100

(\dfrac{88}{90})^t = \dfrac{1}{3}

t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{3})

t = 48.88 s

hence, after 48.88 s the temperature of the body will be 70°C

b) time taken to reach 98°C

T(t) = -90 (\dfrac{88}{90})^t + 100

98 = -90(\dfrac{88}{90})^t + 100

(\dfrac{88}{90})^t = \dfrac{1}{45}

t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{45})

t = 390 s

hence, after 390 s the temperature of the body will be 98°C

5 0
2 years ago
How many triangles exist with the given angle measures?
MA_775_DIABLO [31]

Because triangles also equal a total of 180 degrees, the answer is B

7 0
3 years ago
Read 2 more answers
CAN SOMEONE PLEASE HELP
kotykmax [81]

Answer:

The first one.

Step-by-step explanation:

The symbol that you are comparing the numbers with is equal two or greater than and you have to be 48 inches or taller.

4 0
2 years ago
Help! Write the standard equation of a circle with center (-4,0) and radius 1.5.
Andru [333]

Answer:

Step-by-step explanation:

(x+4)² + y² = 1.5²

6 0
3 years ago
In the diagram, lines l and m are parallel lines cut by transversal line p. (5x-20) 85 what is the value of x ?
Semenov [28]

Answer:

The value of x is 23.

Step-by-step explanation:

5x-20+85=180

5x+65=180

5x=115

x=23

6 0
2 years ago
Other questions:
  • A Girl Scout camp served half of their granola with breakfast. After dinner, they put the remaining 6{,}250 \text{ g}6,250 g6, c
    14·1 answer
  • The scale on a map is 1/4 inch equals 3/4 mile. How long is one mile on the map?
    9·1 answer
  • What is the surface area of a square pyramid with a slant height of 6cm and the length of one side of the square base is 5cm
    7·1 answer
  • Which equations represent the line that is parallel to 3x − 4y = 7 and passes through the point (−4, −2)? Select two options.
    10·2 answers
  • Determine the number of Solutions for the system of equations y = 2x + 3 and y = 2x +3
    7·1 answer
  • Are these triangles similar?
    6·2 answers
  • A recipe for Potato Soup is listed below:
    15·1 answer
  • Robert bought a house with a 6 percent interest rate. Three months later, the rate dropped to 4.35 percent. Robert was frustrate
    14·1 answer
  • True or False? This table represents a function. y 3 12 6 1 -7 -18 -5 -12 8 | 27​
    7·1 answer
  • A company made a storage container with sheet steel walls. The container was in the shape of a rectangular prism, as shown below
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!