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Step2247 [10]
3 years ago
9

Solve for a. 7a + 18 = 102 a =

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
6 0

Answer:

a=12

Step-by-step explanation:

7a+18=102

first, subtract 18 FROM BOTH SIDES!

then you get 7a=84.

next, divide BOTH SIDES by 7

and you get a =12 :)

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Rearrange b + 4 = a to b=
mojhsa [17]
b+4=a\\
b=a-4
4 0
3 years ago
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Is it a b c or d i need help pleaseee
Dmitrij [34]

Answer:

d

Step-by-step explanation:

5 0
2 years ago
An education center offers a total of 400 math, physics and
Vikentia [17]

Answer: 30

Step-by-step explanation:

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8 0
3 years ago
Write the equation of a quadratic function who has the vertex of (4,-7)
timama [110]

Given:

The vertex of a quadratic function is (4,-7).

To find:

The equation of the quadratic function.

Solution:

The vertex form of a quadratic function is:

y=a(x-h)^2+k          ...(i)

Where a is a constant and (h,k) is vertex.

The vertex is at point (4,-7).

Putting h=4 and k=-7 in (i), we get

y=a(x-4)^2+(-7)

y=a(x-4)^2-7

The required equation of the quadratic function is y=a(x-4)^2-7 where, a is a constant.

Putting a=1, we get

y=(1)(x-4)^2-7

y=(x^2-8x+16)-7             [\because (a-b)^2=a^2-2ab+b^2]

y=x^2-8x+9

Therefore, the required quadratic function is y=x^2-8x+9.

6 0
2 years ago
I need help this dosent make sense
horsena [70]
1. 7 + -10 = -3.
2. -3 + -8 = -11
3. 4 + -5 = -1
4. 2 + -6 = -4
(You basically need to add negative numbers to positive numbers in order to get negative numbers.)
7 0
3 years ago
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