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harina [27]
3 years ago
7

2. The sum of the measures of angle X and angle Y is 90. If the measure of angle X'is 30 less than

Mathematics
1 answer:
dimulka [17.4K]3 years ago
5 0

Answer:

The measure of angle x is 50 degrees

Step-by-step explanation:

we know that

x+y=90 ----> equation A

x=2y-30 ----> equation B

solve the system by substitution

substitute equation B in equation A

(2y-30)+y=90

solve for y

3y=90+30

3y=120

y=40^o

Find the measure of angle x

x=2(40)-30=50^o

therefore

The measure of angle x is 50 degrees

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Vera_Pavlovna [14]
Try 116, you add up all the numbers and subtract by 180.
7 0
2 years ago
Choose the BEST estimate!
Novay_Z [31]

Answer:

About 300 dollars

Step-by-step explanation:

THe best estimate for week one is 300, because 96 rounds to 100, and 100 * 3 equals 300.

The best estimate for week 2 is 600, because 204 rounds to 200, and 200 * 3 equals 600.

600 - 300 = 300, therefore the difference is about 300 dollars.

Hope this helps!

4 0
2 years ago
(7x10^-6) (8x 10^-5)
DENIUS [597]

Answer:

56x^2 + 10^-11

Step-by-step explanation:

multiply the 7x and 8x and you get 56x^2

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8 0
3 years ago
What do you want to find out? > The rate at which Bill puts shringles on a rood. What do you know? > Bill and Chip each fi
denis23 [38]

Answer:

  (a) b = (4/7)c

  (b) Bill: 40 shingles/hour; Chip: 70 shingles/hour

Step-by-step explanation:

Let b and c represent Bill's and Chip's rates in shingles per hour, respectively. Then we have ...

  7b = 4c

  c - b = 30 . . . . shingles per hour difference in rates

(a) Bill's rate in terms of Chip's rate can be found by dividing the first equation by 7

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__

(b) To find the rates, we can multiply the second equation by 7 and substitute using the first equation:

  7c -7b = 210

  7c -4c = 210

  c = 210/3 = 70

  b = (4/7)(70) = 40

Bill's rate is 40 shingles per hour; Chip's rate is 70 shingles per hour.

3 0
3 years ago
Joan is selling handmade bead necklaces at a local art fair. She paid $250 to reserve her booth. The cost of supplies for each n
Inga [223]
Y=250+2x is the amount she spends
y=12x is the amount she makes

If the amount she spent = the amount she makes then she break even

250+2x=12x
250=12x-2x
250=10x
So x = 250/10=25 necklaces she needs to sell to break even

Answer is 25 necklaces
3 0
3 years ago
Read 2 more answers
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