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2 years ago

I need help with numbers 1-6

Mathematics

1 answer:

sweet-ann [11.9K]2 years ago

7 0

1) 2.7*10=27 (total number of miles ran by everyone)

4*3=12 (to find how many miles not averaged, multiply)

27-12=15 (how many miles left over for the other 6 people to run)

15/6= 2.5 (your answer)

2. 80/400= .2 (E)

3. Given:

x-5/4=-9/5

Mulitply everything by 4 to cancle it out

x-5=-36/5

add 5 to both sides

x=-11/5

4. A

5.E

6.A

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2. Alicia is writing the program for a video game. For one part of the game she uses the rule to move points on the screen.

LiRa [457]

A and B is the same...

7 0

2 years ago

Axis of symmetry: x=4; points: (3,-2), (6,-26); opening downward

Andru [333]

Vertex form is
y=a(x-h)^2+k
vertex is (h,k)
axis of symmetry is x=4, therfor h=4
y=a(x-4)^2+k

we have some points
(3,-2) and (6,-26)
input and solve for a and k

(3,-2)
-2=a(3-4)^2+k
-2=a(-1)^2+k
-2=a(1)+k
-2=a+k

(6,-26)
-26=a(6-4)^2+k
-26=a(2)^2+k
-26=a(4)+k
-26=4a+k

we have

-2=a+k
-26=4a+k
multiply first equation by -1 and add to second

2=-a-k
-26=4a+k +
-24=3a+0k

-24=3a
divide both sides by 3
-8=a

-2=a+k
-2=-8+k
add 8 to both sides
6=k

the equation is
$y=-8(x-4)^2+6$

3 0

3 years ago

What would the value of X be on this one?

Tanzania [10]

Answer:

i think it's 51 because if you add 106 and 23 together it's 129 then 180-129= 51

Step-by-step explanation:

6 0

3 years ago

What is the positive solution of x square minus 36 equals 5x

777dan777 [17]

Answer:

⇒x=9 (positive solution)

Explanation:

x2−36=5x

→x2−36−5x=0

Factor the expression:

We get:

(x−9)(x+4)=0

First solution:

⇒(x−9)=0x+4

⇒(x−9)=0

⇒x=9

3 0

3 years ago

What is the sum of the first 11 terms of the arithmetic series in which a1= -12 and d=5?

SVEN [57.7K]

Hello :
the terme general is : an = a1 +(n-1)d
a11 = a1+(11-1)×5
a11 = -12+50
a11 = 38
the sum of the first 11 terms is : S11 = (11/2)(a1+a11)
S11 = (11/2)(-12+38)
S11 = 143

3 0

2 years ago