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3 years ago

How many solutions does this equation have? -3n = -4n + 7

Mathematics

2 answers:

ahrayia [7]3 years ago

7 0

Answer:

Step-by-step explanation:

my soulstinos were Solution 1)

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Solution 2)

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The solution is:

−

and

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Katarina [22]3 years ago

5 0

Answer:

just one: 7 you isolate the numbers by doing -3n + 4n = 7, and u get n = 7

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Point C is the center of the circle. The measure of angle ACB is 3x+20. Arc AB measures 65x-4. Find measure of arc AB

NISA [10]

In a circle the measure of a CENTRAL angle = measure of the arc intercepted.
mes Angle ACB = mes Arc AB:

3x+20 = 65x-4
24 = 65x -3x

62x = 24
x = 24/62 = 12/31 = 0.3871

8 0

4 years ago

If ED = 10 and DB = 3x-8, what is the length of EB<br><br> 1. 32<br> 2. 22<br> 3. 10<br> 4. 20

Debora [2.8K]

Based on the picture, we know that ED is equal to DB. Therefore:

2 times ED=EB
2(10)=20

EB is 20

4 0

4 years ago

Read 2 more answers

Maggie is taking out a student loan for $2,600. She plans on paying off the loan in 3 years. At the end of the 3 years, Maggie w

lukranit [14]

Answer: 15%

Step-by-step explanation:

x is the simple interest rate

2,600 * X = 390

390 / 2,600=

15%

6 0

3 years ago

To raise additional money for the school, the pep club decided to open the concession stand during the tournament and sell sandw

Ostrovityanka [42]

The solution would be like this for this specific problem:

Given:<span> x +y = 390 </span>

2x + 4y = 1260

2x+4y=1260 ßdivide by 2

= x+2y=630

x+y=390 ßsubtract

= x+2y-x-y=630-390

y=240

x+240=390

x=390-240=150

<span>So, if they raised $1260 from the concession stand, then they sold 240 sandwiches.</span>

4 0

3 years ago

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The radius of a sphere-shaped balloon increases at a rate of 2 centimeters (cm) per second. If the surface area of the completel

frez [133]

Considering the surface area of the spherical ballon, it will take 7 seconds for the the balloon to fully inflate.

<h3>What is the surface area of a sphere?</h3>

The surface area of a sphere of radius r is given by:

$S = 4\pi r^2$

In this problem, the surface area is of $784\pi$ cm², hence the radius in cm is found as follows:

$784\pi = 4\pi r^2$

$4r^2 = 784$

$r^2 = \frac{784}{4}$

$r^2 = 196$

$r = \sqrt{196}$

r = 14 cm.

The radius start at 0 cm, inflating at a rate of 2 cm/s, hence it will take 7 seconds for the the balloon to fully inflate, as 14 cm/(2 cm/s) = 7 s.

More can be learned about the surface area of a sphere at brainly.com/question/21207980

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4 0

2 years ago