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Sav [38]
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

Mathematics
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.
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Chris made $378 for 18 hours of work.
andre [41]

Answer:

$147

Step-by-step explanation:

378 / 18  = 21

1 hour of work = $21

7 hours of work = $21 * 7 = $147

5 0
3 years ago
Al obtener el valor de lo que costará la fiesta de graduación para tu grupo te das cuenta que el lugar que decidieron alquilar p
dybincka [34]

Explicación paso a paso:

Debemos buscar el costo de cada boleto y la cantidad de personas que deben ir.

Dada la función que da forma al comportamiento expresado como;

f (x) = (-2x) ^ 2 + 80x + 300 donde;

x es el costo de cada boleto

f (x) es el número de personas que deben ir

Para obtener x, usaremos la expresión;

x = -b / 2a

De la ecuación cuadrática dada, a = -2, b = 80 yc = 300

Sustituir;

x = -80/2 (-2)

x = -80 / -4

x = 80/4

x = 20

Por lo tanto, el boleto cuesta $ 20.

Lo siguiente es obtener la cantidad de personas que deben ir. Para conseguirlo, sustituiremos x = 20 en la expresión modelada como se muestra;

f (x) = (-2x) ^ 2 + 80x + 300

f (20) = (-2 (20)) ^ 2 + 80 (20) +300

f (20) = (-40) ^ 2 + 1600 + 300

f (20) = 1600 + 1600 + 300

f (20) = 3500

Por lo tanto, 3500 personas tienen que ir

8 0
3 years ago
100 aluminum cans weigh 5 pounds, If Ray collects 300 cans on clean up day, how many pounds of cants does he have?
padilas [110]
Easy, 100 x 3 is 300 pounds, 5 x 3 is 15, so 15 pounds. :)
7 0
3 years ago
Read 2 more answers
Evaluate a−b+3c when .a=4, b=−2, and c=3. a−b+3c =4−( )+3∙ =4+ + =
igomit [66]

Answer:

15

Step-by-step explanation:

4-(-2)+3(3)

4+2+9

15

5 0
3 years ago
Read 2 more answers
Dalton takes a rectangular piece of fabric and cuts from one corner to the opposite corner. If the piece of fabric is 12 centime
Gemiola [76]

Answer:

mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

7 0
3 years ago
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