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3 years ago

Solve the system of equations by the substitution method. 5x + 10y = 25 2x + 12y = 18

Mathematics

1 answer:

marusya05 [52]3 years ago

5 0

Answer

5x + 10y = 25 x=1 y=2

2x + 12y = 18 x=3 y=1

plz mark brainliest

also plz try to answer this question

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Mike's electronics store sold the following number of cellphones on each of the seven days of a week. DayCell Phones Sold Sunday

bulgar [2K]

Answer:

Step-by-step explanation:

The mean is the sum divided by the number of contributors:

(12 +10 +9 +5 +14 +10 +10)/7 = 70/7 = 10

The mean number of phones sold for the week was 10 phones.

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3 years ago

8) A total of 1456 people attended a high school football game. The cost was $5 for adults and $2.50 for students. If the

MAXImum [283]

Answer:

the answer is 762 adults and 694 students.

Step-by-step explanation:

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3 years ago

As a lifeguard, sara earns a base pay of $80 per day. if her day involves swim instruction, sara earns an additional 9t dollars,

zhuklara [117]

Answer:

Step-by-step explanation:

Sara's base pay is $80

(a) The 9t represents the additional amount of money that she earns if she gives instruction for t hours. 9 stands for $9 per hour

b)The term in the expression is t which stands for the number of hours that she instructs. The coefficient is 9 which stands for the hourly rate

c) The expression for 7 hours would be

We will substitute t into 80 + 9t. It becomes

80 + 9×7

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4 0

3 years ago

I round to 900 I have twice as many hundreds as ones and all my digits are different but their sums are 18 can someone answer th

stellarik [79]

Answer:

The number of once is 9.1

The number of hundreds is 8.9

Step-by-step explanation:

Given as :

The total of digits having ones and hundreds = 900

The sum of digits = 18

Let The number of ones digit = O

And The number of hundreds digit = H

So, According to question

H + O = 18 .........1

100 × H + 1 × O = 900 ........2

Solving the equation

( 100 × H - H ) + ( O - O ) = 900 - 18

Or, 99 H + 0 = 882

Or , 99 H = 882

∴ H = $\frac{882}{99}$

I.e H = 8.9

Put the value of H in eq 1

So, O = 18 - H

I.e O = 18 - 8.9

∴ O = 9.1

So, number of once = 9.1

number of hundreds = 8.9

Hence The number of once is 9.1 and The number of hundreds is 8.9

Answer

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4 years ago

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