All categories

2 years ago

Three times the sum of a number n plus 1 equals two times the sum of the number plus 4. Which equation can be used to find n?

Mathematics

1 answer:

KengaRu [80]2 years ago

6 0

Answer:

Step-by-step explanation:

3(n+1)=2(n+4)

3 × n + 3 × 1 = 2 × n + 2 × 4

3n + 3 = 2n + 8

3n - 2n = 8 - 3 we regroup by categories (unknown and number)

n = 5

You might be interested in

Of the 24 students in Mrs. Jenkins class, only 6 passed the semester exam. What percent of students in Mrs Jenkins class did not

ivolga24 [154]

25% passed mrs.jenkins class.... 24 divved by 6 equals 4 now take 100 divided by 4.. simple answer is 25%

7 0

3 years ago

What is the surface area of this composite solid?______________ square feet 242 319 363 517

jeka57 [31]

Answer:

<h2>The right answer is 415.4 cubic feet.</h2>

Step-by-step explanation:

As you can observe in the image attached, the composite figure is formed by a square prism and a pyramid on top.

We need to find the volum of each part separately.

<h3> Square prism.</h3>

$V_{prims}=11 \times 11 \times 2=242 \ ft^{3}$

<h3>Square pyramid.</h3>

First, we need to find the height of the pyramid. We already know the height of each triangular face of the pyramid, which divides equally the side.

Let's use Pythagorean's Theorem to find the height of the pyramid.

$7^{2}=h^{2} +(5.5)^{2}\\ 49-30.25=h^{2}\\ h=\sqrt{18.75} \approx 4.3$

The height is 4.3 feet, approximately.

Now, we find the volume of the pyramid

$V_{pyramid}=\frac{1}{3}(11 \times 11 \times 4.3) \approx 173.4ft^{3}$

The sum of both figures represents the total volume of the composite figure

$V_{total}=242+173.4=415.4ft^{3}$

Therefore, the right answer is 415.4 cubic feet.

3 0

2 years ago

Read 2 more answers

What is the function of this graph?

Lesechka [4]

Answer:

x=y^2-2

Step-by-step explanation:

This graph, is a parabola that opens to the right.

To answer this question, we just use the vertex form of a sideways parabola- x=a(y-k)^2+h.

In this case, the vertex is (-2, 0), and our value of a is 1, since it opens to the right.

This gives us: x=1(y-0)^2+(-2)

Which simplifies to: x=y^2-2.

Also, the answer to the previous two questions are wrong.

The D value (Domain) is actually [2, ∞)

The R value (Range) is actually "All real numbers" (-∞, ∞)

Let me know if this helps!

3 0

2 years ago

Giving away POINTS Tell me your favorite color!

Aleksandr-060686 [28]

Answer:

mint green

Step-by-step explanation:

brainliest?

3 0

1 year ago

Read 2 more answers

Asap plz give answer

Elena L [17]

Answer:

B) Rotation

Step-by-step explanation:

The arrows at the end of each line imply a line, not a line segment. Since the they both pass through the origin, they rotate about the origin, hence B) Rotation.

3 0

2 years ago

Read 2 more answers