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Artyom0805 [142]
3 years ago
14

Every evening Jenna empties her pockets and puts her change in a jar. At the end of the week she counts her money. One week she

had 40 coins, all of them dimes and quarters. When she added them up, she had a total of $7.75. Let d= number of dimes and q= number of quarters
Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
6 0
A) .10 d + .25 q = 7.75
B) d + q = 40

Multiplying B) by -.10
B)  -.10d -.10q = -4.0
Then adding this to A)
A) .10 d + .25 q = 7.75
.15q = 3.75

Quarters = 25
Therefore, dimes = 15
***************************************************
Double-Check
A) .10 d + .25 q = 7.75
A) .10 * 15 d + .25 * 25 = 7.75
A) 1.50 + 6.25 = 7.75

Correct!!


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¿Cuáles son el término 100 y el término 273 de la sucesión?<br> 2, 4, 6, 8, 10, 12
inn [45]

Answer:

200 and 546

Step-by-step explanation:

dejar a = Primer periodo (first term)

dejar d = Diferencia común (common difference)

dejar 100th término = T100

dejar 273 término = T 273

utilizando

Tn = a + (n - 1)d

T100 = 2 + (100 - 1) 2

= 2 + 99 ×2

= 2 + 198

= 200

T273 = 2 + (273 - 1) 2

= 2 + 272 × 2

= 2 + 544

= 546

8 0
3 years ago
Can someone help me
GenaCL600 [577]

Answer:

40

Step-by-step explanation:

90 + 4x - 8 + 4x + 2 = 180

= 8x = 96

= x = 12

m < a = 4(12)-8 = 40

8 0
3 years ago
Can someone please help me with this ASAP
n200080 [17]
There are 25 grandparents there were in the survey. 4 prefered digital copies, 21 prefered hard copies. 

4/25 prefered digital copies
21/25 prefered hard copies

21 is more than 4. 
<span>The only one of the possible answers that imply that more people prefered hard copies was the third option. Therefore, "More grandparents prefer using a hard copy than a digital copy." is the most likely to be true. </span>
5 0
3 years ago
Gary is making a cake recipe that requires 3/4 cup of flour. But Gary wants to make the cake half of the size it calls for. How
Nataly_w [17]

Answer:

3/8 is half of 3/4

Step-by-step explanation:

5 0
3 years ago
Please help !!!!!!!!!!!
Tamiku [17]

Answer:

m=4

Step-by-step explanation:

3/4 m + 6 = 9

Subtract 6 from each side

3/4 m +6-6 = 9-6

3/4 m = 3

Multiply each side by 4/3 to isolate m

4/3 * 3/4 m = 3 *4/3

m = 4

4 0
3 years ago
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