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xeze [42]
3 years ago
9

Donna and Emily are sisters. Donna’s age and Emily’s age add up to 31. Donna is 3 years younger than Emily.How old are the two s

isters?
What is the system of equations for this problem and how do I solve it using the elimination method?
Mathematics
1 answer:
pishuonlain [190]3 years ago
3 0

Answer:

donna is 14.5 and emily is 17.5

Step-by-step explanation:


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-15= x/-0.5 8= what does x equal
Stels [109]
8*0.5*x=-15
x = -15/4
7 0
3 years ago
Pls help! ill give brainless to the best answer !!<br><br> what is 25% of 75? show your work.
Nana76 [90]

Answer:

18.75

Step-by-step explanation:

25% of 75 =

0.25 x 75 =

18.75

Hope that helps!

4 0
3 years ago
Read 2 more answers
Use the diagram. AB is a diameter, and AB is perpendicular to CD. The figure is not drawn to scale.
Westkost [7]

Answer:

The measure of arc BD is 147°

Step-by-step explanation:

we know that

If segment AB is perpendicular to segment CD

then

The measure of the inner angle CPA is a right angle (90 degrees)

Remember that

The measure of the inner angle is the semi-sum of the arcs comprising it and its opposite.

so

m∠CPA=(1/2)[arc AC+arc BD]

substitute the given values

90°=(1/2)[33°+arc BD]

180°=33°+arc BD

arc BD=180°-33°=147°

7 0
3 years ago
What percent is equivalent to
Soloha48 [4]

Answer:

20%

Step-by-step explanation:

To change a fraction to a percentage , multiply by 100%

\frac{8}{40} × 100%

= 0.2 × 100%

= 20%

8 0
2 years ago
I need help, can someone please explain this step by step.
Helga [31]

180-117.3=62.7

answer is 62.7

3 0
3 years ago
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