All categories

3 years ago

What is the value of x in this equation?? 15(20+x)=420

Mathematics

1 answer:

elena55 [62]3 years ago

5 0

Answer: 8

Step-by-step explanation:

15x+300=420

x = 8

Hope this helps!

You might be interested in

What are the vertex focus and directrix of the parabola with the given equation y=1/28(x-4)^2-5

patriot [66]

If the parabola is rotated so that its vertex is (h,k) and its axis of symmetry is parallel to the y-axis, it has an equation of (x - h)^2 = 4p(y - k), where the focus is (h, k+p) and the directrix is y = k - p. So, we need to determine the values from the equation.

y=1/28(x-4)^2-5
(x-4)^2 = 28(y+5)
(h,k) = (4, -5)
p = 7

focus= (h, k+p) = 4,2
directrix = y = k - p = -12

Hope this answers the question.

8 0

3 years ago

Read 2 more answers

How to explain: the value of 4 in 64,500 is 10x the value in 2,402

Solnce55 [7]

The value on 4 in 64,500 is on the thousands place and on the 2,402 is on the hundreds place

4 0

3 years ago

Read 2 more answers

6378 scientific notation

Virty [35]

6.378x10
i'm not sure

3 0

4 years ago

What is the surface area of a cylinder with a diameter of 8 centimeters and a height of 12 centimeters?

Lostsunrise [7]

The formula for this is $A=2 \pi rh+2 \pi r^{2}$ . If the diameter is 8 the radius is 4, so filling in accordingly we have $A=2 \pi (4)(12)+2 \pi (16)$ and $A=96 \pi +32 \pi$ which is $A=128 \pi$ and when you multiply in 3.14 you get that A = 401.92 or B above.

8 0

4 years ago

PLEASE HELP I WILL GIVE BAINY LIST TO WHOEVER ANSWERS ALL THE QUESTIONS !!!!!

sergejj [24]

Answer:

1. $97\frac{3}{4}$

2. $3$ x $6\frac{3}{4}$ = $20\frac{1}{4}$

3. $77$ $\frac{1}{2}$

4. Yes (explanation given below)

Step-by-step explanation:

1. Find the area of the wall including the door...

Just multiply the numbers for the width and length.

$11\frac{1}{2}$ x $8\frac{1}{2}$ = $97\frac{3}{4}$

And now, as you can see.

$97\frac{3}{4}$ is our answer for 1.

2. Find the area of the door. (improper fraction)

Again, we just have to multiply, then simplify, and remember to keep it in improper fraction format.

$3$ x $6\frac{3}{4}$ = $20\frac{1}{4}$

so now, we can see that that is the area of the door, but according to the question, we have to leave the answer in the improper fraction format. To turn a mixed number into a improper fraction, we have to multiply the denominator of the fraction with the whole then, add the numerator, the answer that we get is going to be the numerator of the improper fraction and the denominator remains the same.

20 1/4 = 81/4 (improper fraction)

So, 81/4 is our answer for 2.

3. Without door space, give how much wall area there is. (mixed number)

So, as we already know that the door covers up 20 $\frac{1}{4}$ , so all what we have to do is, take the area of the Whole wall and door and subtract it by the door area.

WHOLE wall = 97 $\frac{3}{4}$

Door only = 20 $\frac{1}{4}$

$97\frac{3}{4}-20\frac{1}{4} = 77\frac{1}{2}$

So, hence, the answer for 3. is 77 $\frac{1}{2}$

4. Does Amelia have enough paint? Explain...

Yes, amelia has enough paint for covering the whole intire wall because she has enough paint for a 100 square feet, and the actual surfact area of her wall is JUST 97 3/4 square feet. So, she definitely has enough paint to cover that wall and door.

Thank You! Please mark me brainliest so that I get encouraged to make more great answers like this one!

5 0

2 years ago

Read 2 more answers