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maw [93]
4 years ago
8

7(n+4)=21 what is n?

Mathematics
1 answer:
aliya0001 [1]4 years ago
8 0

Answer:

-1

Step-by-step explanation:

divide both sides by 7 and you will get (n+4)=3

then subtract 4 on both sides and get n is equal to -1

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Please Help
Hitman42 [59]

ANSWER

( {y  - 8)}^{2}  =  - 28(x + 5)

EXPLANATION

The given parabola has directrix x=2.

This implies that, the parabola is opens in the direction of the negative x-axis because it must open in a negative direction to the directrix.

The equation of such parabola is of the form:

( {y  - k)}^{2}  = 4p(x - h)

where (h,k)=(-5,8) is the vertex.

|p|  = | - 2 - 5|  = 7

p =  \pm7

But the parabola opens to the left.

p=-7

The equation now becomes

( {y  - 8)}^{2}  = 4( - 7)(x   -  - 5)

( {y  - 8)}^{2}  =  - 28(x + 5)

4 0
4 years ago
1. - 2(x + 11) = -18
77julia77 [94]

Answer:

x = - 2

Step-by-step explanation:

Step 1:

-2 ( x + 11 ) = - 18         Equation

Step 2:

- 2x - 22 = - 18       Multiply

Step 3:

- 2x = 4       Add 22 on both sides

Step 4:

x = 4 ÷ - 2

Answer:

x = - 2

Hope This Helps :)

8 0
3 years ago
Choose the system of equations which matches the following graph:
aleksandr82 [10.1K]
The coordinates give are
(0,6)
(4,9)

(3,6)
(2,3)

These points can be substituted into the systems of equation in the choices and inspect which equations satisfy the value of the points. Doing this, the answer is
3x - 4y = -24
3x - y = 3
4 0
3 years ago
11.) The sequence below shows the number of trees a nursery plants each year.
hjlf

Answer:

A. ez

Step-by-step explanation:

_sequences_eoc_prep_solutions.pdf

SKATE OR DIE

4 0
3 years ago
A rectangular box is 8 and a half inches long,5and a fourth inches wide,and 4 inches high.what is its volume
konstantin123 [22]
You multiply 8.5 by 5.25 by 4 and get 178.5 
7 0
3 years ago
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