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Sladkaya [172]
2 years ago
10

QUICK FOR 10 POINTS

Mathematics
2 answers:
Shtirlitz [24]2 years ago
8 0

Answer:

8 pencils

Step-by-step explanation:

We can reverse everything that is happening in the problem like this!...

Jeremiah has 20 - 4 pencils = 16 than 2 reverse operation of multiplication which will be division then 16 ÷ 2 = 8

Check work? 8 more than 2 times equals 16 + 4 more that Jeremiah has equals 20 pencils

Sever21 [200]2 years ago
8 0
The answer would be 8 pencils. You do this by working backwards.
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Solve each equation by factoring.
nevsk [136]

Answer:

k=1/3; k=-2/5

Step-by-step explanation:

15k^2+k-4=-2\\15k^2+k-2=0\\(3k-1)(5k+2)=0\\3k-1=0; 5k+2=0\\k=1/3; k=-2/5

4 0
3 years ago
What is the solution of the following system?
alexandr402 [8]
<span>4x-y = 15 3x+2y = -8 Multiplying the first equation by two makes for an easy elimination of the y variable. 8x - 2y = 30 3x + 2y = -8 Add vertically. 11x = 22. Divide by 11 on both sides and get x = 2. Plug into an equation. 4(2) - y = 15 8 - y = 15 8 = 15 + y 8 - 15 = y -7 = y. Thus the solution is indeed (2, -7).</span>
5 0
3 years ago
the library has enough DVDs to display an equal number of them in groups of 3,5, or 9. What is the least number of DVDs the libr
Soloha48 [4]
3. i think i rlly don’t know. lol. XD
5 0
3 years ago
Suppose that circles A and B have a central angle measuring 40°. Additionally, circle A has a radius of 5 2 ft and the radius of
vova2212 [387]

<span>Let </span>

rA--------> radius of the circle A

rB-------> radius of the circle B

SA------> the area of the sector for circle A

SB------> the area of the sector for circle B 

 

we have that

rA=5/2 ft

rB=9/2 ft

rA/rB=5/9-----------> rB/rA=9/5

SA=(25/36)π ft²

 

we know that

 

if Both circle A and circle B have a central angle , the square of the ratio of the radius of circle A to the radius of circle B is equals to the ratio of the area of the sector for circle A to the area of the sector for circle B

 

(rA/rB) ^2=SA/SB-----> SB=SA*(rB/rA) ^2----> SB=(9/5) ^2*(25/36)π--->

<span>SB----------- > (81/25)*(25/36)------ > 81/36------ >  9/4π ft²</span>

 

the answer is

the measure of the sector for circle B is (9/4)π ft²

8 0
3 years ago
Read 2 more answers
I need to find the slope from two points!show the work please
nikdorinn [45]

Answer:

36 is the answer I think

Step-by-step explanation:

-18(8-10)

-18 x (-2)

36

8 0
3 years ago
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