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Thepotemich [5.8K]
3 years ago
7

Peter went bowling, Monday to Friday, two weeks in a row. He only bowled one game each time he went. He kept track of his scores

below.
Mathematics
1 answer:
dlinn [17]3 years ago
5 0
Picture?? Or I can’t help you
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A number is 6 greater than 1/2 another number. If the sum of the numbers is 21,find the numbers.
Fed [463]
X = (1/2)y + 6
x + y = 21

Substitute (1/2)y + 6 as x into the equation x + y = 21 since x = (1/2)y + 6.
[(1/2)y + 6] + y = 21
0.5y + 6 + y = 21
1.5y = 15
y = 10

Same thing, now substitute 10 as y in the other equation.
x + y = 21
x + (10) = 21
x = 11

7 0
3 years ago
A cyclist travels 15km due north and then 18 km due east. How far is she from the starting point?​
zavuch27 [327]

Answer:

DONT KNOW SRY

Step-by-step explanation:

8 0
3 years ago
The sweater department ran a sale last week and sold 95% of the sweaters that were on sale. 38 sweaters were sold. How many swea
almond37 [142]

Answer: 40.

Step-by-step explanation:

Given : The sweater department ran a sale last week and sold 95% of the sweaters that were on sale.

95% can be written as 0.95  [ by dividing 100 ]

Also, the number of sweaters sold = 38

Let x be the number of sweaters were on sale.

Then , we have the following equation :_

0.95x=38\\\\\Rightarrow\ x=\dfrac{38}{0.95}=\dfrac{3800}{95}=40

Hence, 40 sweaters were on sale.

6 0
4 years ago
Find the mistakes in the equations
yawa3891 [41]
Second line on the right side of the equation it should be 2x(-13)

so then 8x - 24 + 7 = -26x
8x - 17 = -26x
then in hers she added the 8 to 26 when she should have subtracted it
it should be -17 = -34x
so 17 = 34x
1/2 = x
7 0
3 years ago
Read 2 more answers
Write the equation of the parabola that has the vertex at point (2,7) and passes through the point (−1,3).
mariarad [96]
Step One
Use the vertex to determine the basic equation for the parabola.

y = a(x - 2)^2 + 7 Notice the sign change for x. I have provided a graph to show how this would look with a = 1 (in red.)

What it means is the  2 has to be minus in order that the vertex will shift 2 units in the x direction.

Step Two
Use the point to solve for a.
y = a(x - 2)^2 + 7
When x = - 1
Then y = 3

3 = a(-1 - 2)^2 + 7                combine -1 with - 2
3 = a (-3)^2 + 7
3 = 9a + 7                            Subtract 7 from both sides
3 - 7 = 9a
-4 = 9a                                 Divide by 9.
a = -4/9 
or                                
a = - 0.4444

y = -0.4444(x + 2)^2 + 7 <<<<< answer
y = - 4/9 (x + 2)^2 + 7

Note: if you have choices, list them please.

Note: The red graph is y = (x - 2)^2 + 7 ; a = 1
The blue graph is y = - 4/9(x - 2)^2 + 7 ; a = - 0.44444

You should notice that the a does 3 things to the graph. Before you read the answer, what are those three things? The answer is in the comments.

8 0
4 years ago
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