All categories

3 years ago

7n - 4 = 31. what is the value of the n

Mathematics

2 answers:

Trava [24]3 years ago

5 0

N=5. you can check your answer by doing 7(5)-4=31
7x5= 35
35-4=31

Gelneren [198K]3 years ago

4 0

Answer:

n = 5

Step-by-step explanation:

- Move all terms not containing n to the right side of the equation.

7n = 31 + 4

7n = 35

- Divide each term by 7 and simplify.

n = 5

i hope this helps :)

You might be interested in

Stefan purchases materials to make dog collars. Stefan purchases 10 buckles in a pack and 12 straps in a pack. Stefan doesn't wa

CaHeK987 [17]

Answer:

Step-by-step explanation:

Assuming it take 1 buckle and 1 strap per collar, that means we just need to find the lowest common multiple of these 10-pack buckles and 12-pack straps.

For 10: 0, 10, 20, 30, 40, 50, "60", 70, 80, 90, 100...

For 12: 0, 12, 24, 36, 48, "60", 72, 84, 96, 108, 120...

From this, it is obvious that 60 is the lowest common multiple of these two numbers. Therefore, we know that Stefan can make dog collars without having leftover supplies by using 6 10-pack buckles and 5 12-pack straps.

From this, we know that Stefan does not need to buy 120 of either the buckles or the straps.

5 0

3 years ago

Find the area of the shape.

DedPeter [7]

Step by step: Here,

Formula to find area=l×b

=(2x+3)×(x+4)

=6x × 4x

=24x

Or,

2x+3 × x+4

2xsquare+7

4 0

3 years ago

Let U = {q, r, s, t, u, V, W, x, y, z}

Alexus [3.1K]

Answer:

B'=U-B={q, r, s, t, u, V, W, x, y, z}-{q, s, y, z}={r,t, u, V, W, x, y}

A'=U-A={q, r, s, t, u, V, W, x, y, z}-{q, s, u, w, y}={r,t,v,w,x,z}

B'UC={r,t, u, V,W, x, y}U{v, w, x, y, z).={{r,t, u, V,W, x, y,z}

Step-by-step explanation:

(B'U C) U A'={{r,t, u, V,W, x,y,z}U{r,t,v,w,x,z}={{r,t, u, V,W, x,y,z}

5 0

2 years ago

Luther earned some money doing odd jobs last summer and put it in a savings account that earns 3% interest compounded quarterly

inysia [295]

The function we have to use in this case is

$m(t)=m_o\cdot(1+\frac{0.03}{4})^{4t}$

where mo is the initial amount of money. After 2 teats we get that

$\begin{gathered} m_0\cdot(1+\frac{0.03}{4})^8=800 \\ m_0\cdot1.06=800 \\ m_0=\frac{800}{1.06}\approx754.71 \end{gathered}$

SO he earned 755 approximately

8 0

1 year ago

I really need help someone please help

mario62 [17]

Answer:

7x-11

Step-by-step explanation:

the need is to solve iy

3 0

3 years ago

7n - 4 = 31. what is the value of the n​

7n - 4 = 31. what is the value of the n