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3 years ago

Simplify -5(20 + 3).

2 answers:

7 0

-5(20 + 3)

First, in the parentheses, add 20 + 3. / Your problem should look like: $-5$ × $23$

Second, since the parentheses indicate multiplication, multiply 5 × 23. / Your problem should look like: $-115$

Answer: -115

sammy [17]3 years ago

4 0

Whenever a number is beside a parenthesis without a sign it means multiplication. So you would use PEMDAS work in parenthesis then exponents, multiplication (from left to right) addition and subtraction (from left to right). so you would add 20+3 and get 23 then multiply that by -5 to get -115 as your answer.

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All the dimensions of a triangle were multiplied by the same factor. If the base of the triangle went from 1 centimeter to 3 cen

timama [110]

The answer is 9.

To calculate this, we will use Galileo's square cube law, used to describe the change of the area or the volume of the shape, when their dimensions increase or decrease. The formula used for change of the area is
$A_2= A_1 (\frac{l_2}{l_1} )^{2}$
A₂ - the area after the change,
A₁ - the area before the change,
l₂ - the dimension after the change,
l₁ - the dimension before the change.

It is given:
l₁ = 1 cm
l₂ = 3 cm

Let's use this formula for the mentioned triangle:
$A_2=A_1( \frac{l_2}{l_1}) ^{2} =A_1( \frac{3}{1})^{2} =A_1*3 ^{2} =9A_1$

Therefore, the area of the triangle was multiplied by 9.

8 0

3 years ago

Look at the picture...

UkoKoshka [18]

Answer:

No solution

Step-by-step explanation:

There is no option good for the two graphs.

I think simple vertical stretch or simple vertical compression will occur at the same side of axis, but |x| located at quadrant I and II while -1/2|x| located at quadrant III and IV.

The answer should be "reflect over the x axis and then vertical stretch"

7 0

3 years ago

Which equation is equivalent to startroot x^2 + 81 EndRoot = x + 10?

Nitella [24]

Answer:given below

Step-by-step explanation:

sqrt x^2 +81= x + 10

x^2 + 81 = (x+10)^2

x^2 + 81 = x^2 + 20x + 100

so answer is:

x^2 + 81 = x^2 +20x + 100

..HOPE IT HELPS YOU...ALL THE BEST

3 0

2 years ago

Enter the value of a and b that complete the sum: 3/x + 5/x^2 = ax+b/x^2

Aleksandr [31]

Answer:

a= $\frac{3}{x^{2} }$

b=5

Step-by-step explanation:

we are given

$\frac{3}{x} }$ + $\frac{5}{x^{2} }$ =ax+ $\frac{b}{x^{2} }$

we will compare both sides of equaion

$\frac{b}{x^{2} }$ = $\frac{5}{x^{2} }$

comparing both sides we get

b=5

and

$\frac{3}{x} }$ =ax

a= $\frac{3}{x^{2} }$

hence

a= $\frac{3}{x^{2} }$

and b=5

4 0

3 years ago

An ant looks up to the top of a tree at an angle of elevation of 40 degrees. If the ant is 30 feet from the base of the tree, wh

Alborosie

For the answer to the question above, this is a right triangle problem using the tangent function.
Tan(x) = Opposite (O) / Adjacent (A) 
x = 40 degrees 
A = 30 ft 
Solve for O 
O= Tan (x) * A 
O = Tan (40) * 30 
Use your calculator or whatever method to get the tangent of 40 degrees (which is .84) 
O = .84 * 30 
O = 25.2 Ft

5 0

3 years ago

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