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allochka39001 [22]
3 years ago
14

Michael has a total of$4.40 in dimes (1 dime=$0.10) and quarters (1quarter=$0.25), and he has 20 coins in total. Which of the fo

llowing systems of equations can be used to find the number of dimes, d, and the number of quarter,q, he has?
Mathematics
1 answer:
Vesnalui [34]3 years ago
5 0
A) d+q=20
0.1d+0.25q=4.40 Let's just read what this says: first, # of dimes (d) plus # of quarters (q) is 20.The second equation can be called the VALUE EQUATION; it says that one tenth of a dollar ($0.10) times the # of dimes is part of the total monetary value, and that one quarter of a dollar ($0.25) times the # of 'quarter' coins is the other part of this stash, and it totals $4.40. VOTE FOR A.
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Andrew went for a walk in the park. The trail he took is 1 1/4 miles long. He walked for 1/2 mile before stopping for a water br
garik1379 [7]

Andrew walked for 3/4 miles after his break

<h3>How to calculate the number of miles Andrew walked after the break ? </h3>

Andrew went for a walk

The trail he took is 1 1/4 miles long

He walked for 1/2 miles before stopping for a water break

After the break, he continued the journey

He continued the journey without stopping

The distance Andrew walked after his break can be calculated as follows

5/4 - 1/2

= 5-2/4

= 3/4

Hence Andrew walked for 3/4 miles after taking the break

Read more on miles here

brainly.com/question/14085856

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1 year ago
Find the missing side length of the right triangle
mr_godi [17]
B) 29
Because 20^2+21^2=c^2
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2 years ago
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Carbon-14 dating assumes that the carbon dioxide on Earth today has the same radioactive content as it did centuries ago. If thi
defon

7978 years

Step-by-step explanation:

A = A02^(-t/hl)

where hl = half-life.

Dividing both sides by A0 and taking the logarithm, we get

ln(A/A0) = -(t/hl)ln2

or solving for t,

t= -(hl)ln(A/A0)/ln2

note that A/A0 = 0.38

t = -(5715 yrs)[ln(0.38)/ln2]

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2 years ago
Please help me. will mark brainliest. what is the answer?
VARVARA [1.3K]

Answer:

A ) y=-1/2x+2

Step-by-step explanation:

since the equation is y=2x+4 and the points are (-2,3) and the line is perpendicular to that equation

y=-1/2x+b

enter the point (-2,3)

3=1+b

b=2

so

y=-1/2x+2

3 0
3 years ago
Please help!!!!
tatyana61 [14]

Answer:

Step-by-step explanation:

From the figure attached,

If the figures shown are congruent (Equal in shape and size), length of all the sides must be equal.

Therefore, sides sides CD and GH must be equal in measures.

Distance between the two points (x_1,y_1) and (x_2,y_2) is given by,

d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Length of the side CD having ends C(-4, 4) and D(0, 5) will be,

CD = \sqrt{(-4-0)^2+(4-5)^2}

CD = \sqrt{(16+1)}

     = \sqrt{17}

Length of GH having ends G(0, -4) and H(4, -5) will be,

GH = \sqrt{(0-4)^2+(-4+5)^2}

      = \sqrt{16+1}

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Therefore, m(CD) = m(GH)

Similarly, we can prove all corresponding sides of two figures equal in measure.

This shows ABCD ≅ EFGH.

3 0
3 years ago
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