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Aloiza [94]
3 years ago
7

20% of what number is 90?

Mathematics
1 answer:
ehidna [41]3 years ago
8 0
90 = (20)(x)
so you have to solve for x
90/.20 =450
answer is 450
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Triangle def is similar to triangle xyz. what is the value of x?
nexus9112 [7]

Answer:

x = 48 ft

Step-by-step explanation:

Triangle DEF is similar to triangle XYZ

10 x 4 = 40 ft

so

12 x 4 = 48 ft

Answer

x = 48 ft

3 0
3 years ago
What is the sum of 5c-c
shutvik [7]

Answer:

4c

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

5c - c

<u>Step 2: Simplify</u>

  1. [Subtraction] Combine like terms:                                                                 4c
6 0
3 years ago
A line l2 is perpendicular to the line x + 2y – 5 = 0 without computing the gradient of this
Stells [14]

Answer:

y=2x-2

Step-by-step explanation:

first, let's put the line into y=mx+b form (slope-intercept form), where m is the slope (or gradient) and b is the y intercept

add 5 to both sides

x+2y=5

subtract x from both sides

2y=-x+5

divide by 2

y=-1/2x+5/2

perpendicular lines have slopes (gradients) that are negative (one is positive, another one is negative) and reciprocal (they are essentially the same number, just "flipped")

to find the slope of I2:

since -1/2 is negative, that means the slope of I2 will be 2 (2/1 is the reciprocal of 1/2 (positive version of -1/2))

so here's our equation so far:

y=2x+b

now we need to find b

because line will pass through (3,4), we can use it to solve for b

substitute 4 as y and 3 as x

4=2(3)+b

multiply

4=6+b

-2=b

therefore the equation is y=2x-2

hope this helps!!

3 0
3 years ago
How can I solve .6 x .5
Harrizon [31]
By adding 6 five times. Which is 30
5 0
3 years ago
Read 2 more answers
Two dice are rolled. Find the probability that the sum of the numbers on the two dice is 4.
photoshop1234 [79]
1/12

there are 6 faces of dice :1,2,3,4,5,6
total no. of faces(N)= 6
to make four it should= (1+2) (2+2) (3+1)
total no of dice(n) = 2
formula=
N^{n}
probability= 3/36
=1/12
4 0
3 years ago
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