All categories

2 years ago

2 times the sum of a number and 5 is 20

Mathematics

2 answers:

d1i1m1o1n [39]2 years ago

8 0

The number is 5. Steps shown below

pishuonlain [190]2 years ago

6 0

$2(x+5)=20\\ \\ 2x+10=20\\ \\ 2x=20-10\\ \\ 2x=10\\ \\ x=5$

Confirming the other answer. 5 is correct.

Hope this helps!

You might be interested in

An object is traveling around a circle with a radius of 20 meters. If in 10 seconds a central angle of 1/5 radian is swept out,

PilotLPTM [1.2K]

The linear speed of the object is the ratio between the measure of the arc it had traveled and the time. For the length of the arc,
2π x (20 m) x (0.2 rad/ 2π rad) = 4 meters
Divide this by the time, 10 s. Thus, the linear speed is equal to 0.4 m/s.

8 0

2 years ago

Read 2 more answers

SoIve the system of equations by elimination. (Addition)<br> 1)-2x + 4y = -22<br> 2x + 8y = –26

Rufina [12.5K]

Answee:

We have these two equations:

-2x +4y =-22

2x + 8y -26

We need to try to get the same number multiplying both x or y, I think we can make the 2 of the first equation negative, for that, we multiply all the equation by -1:

2x + 8y =-26 ---- -2x - 8y =26

Now we have this:

-2x +4y = -22

-2x -8y = 26

Now e substract both equations:

-2x - (-2x) +4y -(-8y) = -22-26

12y = -48

Y = -48/12 = -4

And we replace to get x

-2x + 4y = -22

-2x +4*(-4)=-22

-2x - 16 = -22

x= -6/-2 =3

6 0

2 years ago

Read 2 more answers

Is this linear or non linear?<br> x. 0,2,4,6<br> y. 2,6,18,38

quester [9]

I’m pretty sure that will be linear.

3 0

2 years ago

9 ⅚ + 1 ¼ + ___________ = 14

tresset_1 [31]

Answer:

reeaADADSDDSSA

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

If Dominik completes a project by himself, it will take him 8 hours. Working with Katarina, it will take them 5 hours. If they w

Marysya12 [62]

The main formula we use here is Work=Rate*Time,

1. The rate (speed of working) of Dominik is

$r_D=1project/8hours= \frac{1}{8}(prj/h)$

2. Let the the rate of Katarina be $r_K=x(prj/h)$

Together they have a rate of $r_D_K$ equal to $\frac{1}{8}+x$ (project per hour)

so $(\frac{1}{8}+x) ( \frac{proj}{hr})*5(hr)=1(proj)$

simplify the units:

$(\frac{1}{8}+x) *5=1$

$\frac{1}{8}+x = \frac{1}{5}$

$x= \frac{1}{5}- \frac{1}{8}= \frac{8-5}{40}= \frac{3}{40}$

so the rate of Katarina is 3/40 (proj per hour)

Now, the rate of Dominik was 1/8 (pr/hr)=5/40 (pr/hr)

In 5 hours Dominik complets 5*5/40=25/40 of the project

Katarina completes 5*3/40=15/40 of the project.

7 0

2 years ago

Read 2 more answers