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ruslelena [56]
3 years ago
6

Sara has a son and a daughter – Billy and Jane. Billy is five times as old as Jane. Their mother is now three times as old as Bi

lly, and in 2 years she will be eight times as old as Jane. Find the present age of the mother.
Please solve and show ur work. If u do, I will make u brainliest (if u r correct)

PLEASE HELP
Mathematics
1 answer:
sleet_krkn [62]3 years ago
8 0

Answer:

30 years old.

Step-by-step explanation:

Here's what we know.

B=5J

M+2=8J+16

M=3B

So now let's solve using substitution.

M+2=8J+16

M=8J+14

But we know that M=3B

3B=8J+14

And we know B=5J

3*5J=8J+14

15J=8J+14

7J=14

J=2

Now, we can plug it into the M+2=8J+16

M+2=2*8 +16

M+2=16+16

M+2=32

M=30

Hope you enjoyed.

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Please help me with #1
jasenka [17]

let apple juice = x

 milk = 2x

 fruit punch = 3x

3x + 2x + x = 660

6x = 660

x = 660/6

x = 110 apple juices

2*110 = 220 milks

3*110 = 330 fruit punches

6 0
3 years ago
25. An apple is launched directly upward at 64 feet per second from a platform 80 feet high. The equation for this
Viktor [21]

Answer:

a. 144 ft

b. 5 s

Step-by-step explanation:

h = -16t² + 64t + 80

a. This is a parabola, so the maximum height is at the vertex.

t = -64 / (2 × -16)

t = 2

h = -16(2)² + 64(2) + 80

h = 144

The apple reaches a maximum height of 144 ft.

b. 0 = -16t² + 64t + 80

0 = t² − 4t − 5

0 = (t + 1) (t − 5)

t = -1 or 5

t must be positive, so it takes 5 seconds to reach the ground.

3 0
2 years ago
Does someone mind helping me with this problem? Thank you!
____ [38]

Answer:

5.20

Step-by-step explanation:

48 / 9.23 = 5.20043336945

rounded to tenth is 5.20

Hope This Helped

8 0
1 year ago
Is 3(b+c) equivalent expressions?<br><br>A. True <br><br>B. False
andre [41]

Answer:

Is 3(b+c) equivalent expressions?

A. True

8 0
3 years ago
Read 2 more answers
Someone help me please !!!
KIM [24]

Answer:

1. 10

2. 12

3. Sqrt 130

4. Sqrt 45

Step-by-step explanation:

To find the missing side of a right triangle, use the Pythagorean Theorem. The Pythagorean Theorem is a^2+b^2=c^2 where a and b are the legs with a being the smallest and c is the hypotenuse.

1. a=6, b=8, c=?

6^2+8^2=c^2\\36+64=c^2\\100=c^2\\10=c

2. a=5, b=?, c=13

5^2+b^2=13^2\\25+b^2=169\\169-25=b^2\\144=b^2\\12=b

3. a=7, b=9, c=?

7^2+9^2=c^2\\49+81=c^2\\130=c^2\\\sqrt{130}=c

4. a=2, b=?, c=7

2^2+b^2=7^2\\4+b^2=49\\49-4=b^2\\45=b^2\\\sqrt{45}=b

5 0
3 years ago
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