All categories

3 years ago

18 increased by twice a number

Mathematics

2 answers:

mamaluj [8]3 years ago

6 0

Answer:

18+2x

Step-by-step explanation:

Let the number be x.

Translate: 2x + 18 = x - 4.

Subtract x from each side: x + 18 = -4.

Subtract 18: x = -22.

Check: 2(-22) + 18 = -44 + 18 = -26; -22 - 4 = -26.

Charra [1.4K]3 years ago

4 0

Answer:

I am pretty sure that the answer is 18+2n

You might be interested in

Calculate the slope of the line that passes through the following points:

alina1380 [7]

Answer:

Step-by-step explanation:

Slope is -7--7/1--4

=0/5

7 0

3 years ago

Brooke Savings and Trust pays 6% interest compounded quarterly on regular savings accounts. Cain Anderson deposited $3400 in a r

12345 [234]

3400+114×6=4,084answer

3 0

4 years ago

Look at the model. What division does it show

Alex

That showed be 20/6 which is 3 with a reminder of 2

7 0

3 years ago

Tommy-Too-Shoes invested $3,000 at 4.5%. How much will he have in 24 years?

Flura [38]

Simple interest formula is i=prt
3000*4.5*24

$3240 with total calculations
$240 interest only

3 0

4 years ago

1. In triangle XYZ, A is the midpoint of XY, B is the midpoint of YZ, and C is the midpoint of XZ. Also, AY = 7, BZ = 8, and XZ

Varvara68 [4.7K]

Answer:

Part 1) The perimeter of triangle ABC is 24 units

Part 2) $y=97\°$

Step-by-step explanation:

Part 1) we know that

The <u><em>Midpoint Theorem</em></u> states that the segment joining two sides of a triangle at the midpoints of those sides is parallel to the third side and is half the length of the third side

see the attached figure to better understand the problem

Applying the midpoint theorem

step 1

Find the value of BC

$BC=\frac{1}{2}XY$

$XY=2AY$ ---> because A is the midpoint

substitute the given value of AY

$XY=2(7)=14\ units$

$BC=\frac{1}{2}(14)=7\ units$

step 2

Find the value of AC

$AC=\frac{1}{2}YZ$

$YZ=2BZ$ ---> because B is the midpoint

substitute the given value of BZ

$YZ=2(8)=16\ units$

$AC=\frac{1}{2}(16)=8\ units$

step 3

Find the value of AB

$AB=\frac{1}{2}XZ$

substitute the given value of XZ

$AB=\frac{1}{2}(18)=9\ units$

step 4

Find the perimeter of triangle ABC

$P=AB+BC+AC$

substitute

$P=9+7+8=24\ units$

Part 2) Find the measure of angle y

step 1

Find the measure of angle z

we know that

The sum of the interior angles in a triangle must be equal to 180 degrees

$55\°+42\°+z=180\°$

solve for z

$97\°+z=180\°$

$z=180\°-97\°$

$z=83\°$

step 2

Find the measure of angle y

we know that

$z+y=180\°$ ----> by supplementary angles (form a linear pair)

we have

$z=83\°$

substitute

$83\°+y=180\°$

solve for y

$y=180\°-83\°$

$y=97\°$

6 0

3 years ago

18 increased by twice a number​

18 increased by twice a number