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diamong [38]
3 years ago
9

Why are 4(5) and 20 equivalent expressions?

Mathematics
2 answers:
Studentka2010 [4]3 years ago
5 0

Answer:

4 times 5 = 20, and 20 is... well.. 20

Step-by-step explanation:

When a number has another number in parentheses by it, it means you multiply the numbers together. So 4(5) is the same as 4 times 5, which equals 20

Lunna [17]3 years ago
5 0

Answer:

because 4 to the power of 5 is 5 x 5 x 5 x 5 and that equals 20

and the next number is 20

Step-by-step explanation:

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A direct variation function contains the points (-9, -3) and (-12,4). Which equation represents the function?
Triss [41]

Answer:

y = -\frac{7x}{3} - 24

Step-by-step explanation:

We can model this function using the equation of a line:

y = ax + b

Where a is the slope of the line and b is the y-intercept.

To find the values of a and b, we can use the two points given:

(-9, -3):

-3 = a * (-9) + b

-9a + b = -3

(-12, 4):

4 = a * (-12) + b

-12a + b = 4

If we subtract the second equation from the first one, we have:

-12a + b - (-9a + b) = 4 - (-3)

-12a + 9a = 4 + 3

-3a = 7

a = -7/3

Then, finding the value of b, we have:

-12a + b = 4

28 + b = 4

b = -24

So the equation is:

y = -\frac{7x}{3} - 24

3 0
3 years ago
In order to solve the following question, please use the image below:
lesantik [10]

Answer:

Step-by-step explanation:

All of the res ones are congruent. HJ is too because <HBJ is also 98 degrees because of vertical angle theorem. Hope this helps!

4 0
3 years ago
The difference of 7 and a number x is 10
Dovator [93]

that is 7X=10

= 1.42857143 or about1.42

5 0
4 years ago
If tan θ =(√3)/3, 0◦&lt; θ &lt; 360◦,
svetlana [45]
Arctan (√3 /3) = 30°. = π/6 rad

That is the value searched, in degrees and radians.

You can verifiy that tan(30°) = sin(30°) / cos(30°) = [1/2] / [√3/2] = 1/√3 = √3 / 3

 
3 0
3 years ago
Nancy wants to buy a sweater that is priced at $75. If the store is running a 60% off sale, what will be the
AleksAgata [21]

Answer:

$30.00

Step-by-step explanation:

The original price of the sweater is $75.00.  The new sale price is the original price of  100% less  60% of the original price.  That means the sales price is 40% of the original price.

You can do this 2 ways:

1.  $75 x 60% or .60 = $45

  $75-45 = $30

or

2.  $75 x 40% or .40 = $30

3 0
2 years ago
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