Ask question

Ask question

All categories

3 years ago

5

Mr. Harris has batteries for his calculators. If b represents the number of batteries and c represents his calculators, how many

1 answer:

icang [17]3 years ago

3 0

These are simultaneous equations, and you can solve this by using the substitution method:

b = 4c
3c = -2b + 44

3c = -2(4c) + 44
3c = (-2 x 4c) + 44
3c = -8c + 44

11c = 44
c = 44/11
c = 4

b = 4c
b = 4(4)
b = 4 x 4
b = 16

Therefore, Mr. Harris has 16 batteries.

You might be interested in

Fernell and Dabney shared the driving

Agata [3.3K]

Answer:

15 hours

Step-by-step explanation:

Given:

Fernell's speed $v_F= 50$ mph

Dabney's speed $v_D= 64$ mph

Denote:

$D_F$ - distance covered by Fernell

$D_D$ - distance covered by Dabney

$t_F$ - Fernell's time

$t_D$ - Dabney's time

1. If Fernell drove for 3 hours longer than Dabney, then his time is 3 hours more than Dabney's time and

$t_F=t_D+3$

2. If Fernell covered 18 miles less than Dabney, then

$D_D-D_F=18$

Use formula $D=t\cdot v$

$D_D=v_D\cdot t_D\Rightarrow D_D=64\cdot t_D\\ \\D_F=v_F\cdot t_F\Rightarrow D_F=50\cdot (t_D+3)$

Subtract from the first equation the second equation and equate it to 18:

$64t_D-50(t_D+3)=18\\ \\64t_D-50t_D-150=18\\ \\14t_D=168\\ \\t_D=12\ \text{hours}$

$t_F=t_D+3=12+3=15\ \text{hours}$

5 0

3 years ago

Please help............

alina1380 [7]

Answer:

(n+5) / 4 -7 =___________

6 0

3 years ago

Three sisters share 5 sandwiches equally. How many sandwiches does each sister get?

AfilCa [17]

I drew it pictorially but think of it as 5 sandwiches divided by 3 sisters. Therefore it’s 5/3

6 0

3 years ago

Read 2 more answers

Root of the equation 0=2x+8

Alinara [238K]

What exactly is it asking for

4 0

3 years ago

Which two line segments are congruent

agasfer [191]

Answer:

AB and EF

Step-by-step explanation:

They are the same length

4 0

3 years ago

Read 2 more answers