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4 years ago

1.7+-5.2+-4.3c+-9.1 what is the answer

Mathematics

2 answers:

Nuetrik [128]4 years ago

5 0

Answer:

-4.3c-12.6

Step-by-step explanation:

Elodia [21]4 years ago

4 0

Answer:

-4.3c-12.6

Step-by-step explanation:

Replace all occurrences of

−

with a single

−

. A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because

⋅

−

1.7

−

5.2

−

4.3

−

9.1

Subtract

5.2

from

1.7

−

3.5

−

4.3

−

9.1

Subtract

9.1

from

−

3.5

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inna [77]

Hey there!

If z = 5

we replace "z" with "5"

So, let's test out the problem to see if it is true or false

Problem becomes: $3(5) = 2(5) + 5$

Let's work this out

$3(5) = 15$

Problem becomes: $15 = 2(5) + 5$

$2(5) = 10$

Problem becomes: $15 = 10 + 5$

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So, therefore it looks like this statement/ sentence is $True$ !

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3 years ago

A jar of quarters and dimes has total value of $20.70. The jar has 10 more quarters than dimes. To find the numbers of quarters

lakkis [162]

There are 62 quarters and 52 dimes in the jar.

Step-by-step explanation:

Given,

Worth of jar coins = $20.70 = 20.70*100 = 2070 cents

1 Quarter = 25 cents

1 Dime = 10 cents

Let,

Number of quarters = x

Number of dimes = y

According to given statement;

25x+10y=2070 Eqn 1

x=y+10 Eqn 2

Putting value of x from Eqn 2 in Eqn 1

$25(y+10)+10y=2070\\25y+250+10y=2070\\35y=2070-250\\35y=1820\\$

Dividing both sides by 35

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Putting y=52 in Eqn 2

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There are 62 quarters and 52 dimes in the jar.

Keywords: linear equation, substitution method

Learn more about linear equations at:

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