Hi guys my little brother needs help to Do his homework And I’m doing mine so I can’t help him can anyone help plzz

Mathematics

1 answer:

alukav5142 [94]4 years ago

3 0

The answer is 91.77

22.89 x 2 =45.78

45.78 + 45.99 = 91.77

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Three siblings date Kate and Sarah spent 100 hours helping Habitat for Humanity build new housing .Sarah worked 15 hours more th

Inessa [10]

The starting equation is
100=S+D+K
S is for Sarah, D is for Dave, and K is for Kate

This is what we know:
S=15+D
and
K=D-5
Now that we know how to find the values of everything, we must plug it in.

100=(15+D)+D+(D-5)
Combine like terms.
100=10+3D
Subtract 10 to isolate variable.
90=3D
Divide by 3 to isolate variable.
30=D
Plug in number to find the answers.

Answer:
Sarah worked for 45 hours
Dave worked for 30 hours
Kate worked for 25 hours

3 0

3 years ago

Read 2 more answers

You have 8 times as many dimes as nickels. You have 18 dimes

fenix001 [56]

Answer:

$1.70

Step-by-step explanation:

Let the number of nickels be $x$ .

Thus, by the problem statement, the number of dimes is [/tex] 8 \cdot x = 8x. [/tex]

Therefore, there are $8x + x = 9$ coins in total. To find what $x$ is, we need to solve the equation $9x = 18.$ This can be done by dividing both sides by $9$ which gives $x=2$ . Plugging these values in tells us that there are $2$ nickels and $16$ dimes. (Test it out!) Thus, the nickels are worth $2 \cdot 5 = 10$ cents and the dimes are worth $16 \cdot 10 = 160$ cents, so in all, you have $10 + 160 = 170$ cents which is $1.70.