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boyakko [2]
2 years ago
10

What is algebraic expression for a number increased by 13 is 1,989.​

Mathematics
2 answers:
SpyIntel [72]2 years ago
7 0

Let the variable n represent the unknown number

  • Start with n

\tt \longrightarrow \: n

  • Increased by 13 means add 13 to it

\tt \longrightarrow \: n + 13

  • Is 1989 means it equals 1989

\tt \longrightarrow \: n + 13 = 1989

<u>➪</u><u> </u><em>T</em><em>h</em><em>u</em><em>s</em><em>,</em><em> </em><em>T</em><em>h</em><em>e</em><em> </em><em>f</em><em>i</em><em>n</em><em>a</em><em>l</em><em> </em><em>e</em><em>q</em><em>u</em><em>a</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>i</em><em>s</em><em> </em><em>(</em><em>n</em><em>+</em><em>1</em><em>3</em><em>=</em><em>1</em><em>9</em><em>8</em><em>9</em><em>)</em>

White raven [17]2 years ago
4 0

Answer:

expression: x + 13 = 1989

explanation:

Let the number be x

so when this number is increased " + " by 13, it equals to 1989

<u>processing</u>:

  • x + 13 = 1989
  • x = 1989 - 13
  • x = 1976

The number is 1976.

The algebraic equation used: x + 13 = 1989

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The roof of this garden shed has a gradient of 0.35. find the height of the shed​
Ilya [14]

The height of the shed is 2.325 m

The complete question is

The roof of a lean-to-garden shed has a gradient of 0.35.find the height....they have given the base as 1.5m and a shorter height 1.8m its like a house

<h3>What is a right Triangle ?</h3>

In a Triangle when one angle is 90 degree , the triangle is called Right Triangle .

Structure of the house is a right triangle with base = 1.5m

(height of that triangle)/1.5 = 35/100

height of that triangle = 1.5*0.35 = 0.5250

Ans: greater height of the lean-to = 1.8 + 0.5250 = 2.325 meters.

The height of the shed is 2.325 m.

To know more about Right Triangle

brainly.com/question/6322314

#SPJ1

6 0
2 years ago
Suppose it takes 45 hours for robot A to construct a new robot. Working together with robot B, it takes 25 hours for both robots
Len [333]

Answer:

56 hours 25 minutes

Step-by-step explanation:

Given:

Suppose it takes 45 hours for robot A to construct a new robot

It takes 25 hours for both robots to construct a new robot.

Question asked:

How long would it take robot B to construct a new robot, working alone ?

Solution:

Let the time taken by robot B to construct new robot = x

<u>By robot A</u>

It takes 45 hours to construct = 1 new robot

It takes 1 hour to construct = \frac{1}{45} \ new\ robot

<u>By robot B</u>

It takes x hours to construct = 1 new robot

It takes 1 hour to construct = \frac{1}{x} new robot

<u>By working together</u>

It takes 25 hours to construct = 1 new robot

It takes 1 hour to construct = \frac{1}{25} \ new\ robot

\frac{1}{25} new robot is constructed in = 1 hour

<u><em>New robot is constructed by both working together in 1 hour = New robot is constructed by robot A in 1 hour + New robot is constructed by robot B in 1 hour </em></u>

\frac{1}{25} =\frac{1}{45} +\frac{1}{x} \\

Subtracting both sides by \frac{1}{45}

\frac{1}{25}-\frac{1}{45} =\frac{1}{45} -\frac{1}{45}+\frac{1}{x} \\\\\frac{1}{25}-\frac{1}{45} =\frac{1}{x}\\\\ Taking\ LCM \ of \ 25\ and\ 45,\ we\ got\ 225

\frac{9-5}{225} =\frac{1}{x} \\ \\ \frac{4}{225} =\frac{1}{x}\\\\ By\ cross \ multiplication\\4\times x=225\\Dividing\ both\ sides\ by\ 4\\x=56.25\ hours

Thus, robot B would take 56 hours 25 minutes to construct a new robot, working alone.

4 0
3 years ago
Read 2 more answers
Which of the symbols correctly relates the two numbers below? Check all that apply. 25 ? 35
Digiron [165]
The correct symbol would be <. hoped this helps
4 0
3 years ago
Read 2 more answers
Can someone please answer it correctly if it’s correct I will mark you brainliest
dem82 [27]

Answer:

-\frac{5}{2}, -2, 1.7

Step-by-step explanation:

1. Make fraction to decimal

-\frac{5}{2} = -2.5

2. Order from least to greatest.

1.7 > -2 > -2.5

Least to greatest : -\frac{5}{2}, -2, 1.7

4 0
3 years ago
Would 64, 32, and 24 inch perimeter make a triangle?
Harlamova29_29 [7]

Answer:

no

Step-by-step explanation:

the two smaller numbers added together need to be greater than or equal to the larger number

8 0
3 years ago
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