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3 years ago

What’s the value of x

Mathematics

2 answers:

Alisiya [41]3 years ago

5 0

21 is the correct answer

Sever21 [200]3 years ago

4 0

Answer:

Step-by-step explanation:

4x and 84 share the same value, so divide 84 by 4 to get the value of x

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I need help plz

shusha [124]

The solution for given linear equation systems is (3,-4).

Option: C

Step-by-step explanation:

The given equations are 5x+3y=3 and x+y= -1.

Let us isolate x value from equation 5x+3y=3.

5x = 3-3y.

$x=\frac{3-3y}{5}$ .

Substitute this x value in equation x+y= -1.

$\frac{3-3y}{5}+y=-1$ .

After taking LCM for the denominator,

$\frac{3-3y+5y}{5}= -1$ .

3-3y+5y=-5.

2y=-8.

y=-4.

For $x=\frac{3-3y}{5}$ substitute the y value.

$x=\frac{3-3(-4)}{5}$ .

$x=\frac{3+12}{5}$ .

$x=\frac{15}{5}$ .

x=3.

∴ The solution is (3,-4).

8 0

3 years ago

(5 marks)

Shtirlitz [24]

I thought this right but sorry if it is wrong

first make the 6% in amount by 6×10,000÷100=3600

then, the convert 4 year into month by (4×12)=48month. after that divide 48months by 4 month.i.e.48÷4=12.at last multiply 12 by 3600.i.e. 12×3600=43200

3 0

3 years ago

If 8 cakes cost $62.40, how much would 3 cakes cost?

Ilya [14]

Answer:

Step-by-step explanation:

Given,

Cost price of 8 cakes = $62.40

So,

Cost price of 1 cake = $ $\frac{62.40}{8}$

Therefore,

Cost price of 3 cakes

= $( $\frac{62.40}{8}$ × 3)

[On dividing 62.40 by 8]

= $(7.80 × 3)

[On multiplying]

= $23.40

Hence,

The required cost of 3 cakes is $23.40 (Ans)

3 0

2 years ago

Read 2 more answers

, list the first five terms of each sequence. f(n + 1) = −2f(n) + 8 and f(1) = 1 for n ≥ 1

svet-max [94.6K]

Answer: 1, 7, 1, 7, 1.

Step-by-step explanation:

The given function : $f(n+1)=-2f(n)+8$ and f(1) = 1 for n ≥ 1

We put value of n=1,2,3,4 , we get

For n=1 , $f(2)=f(1+1)=-2f(1)+8=-1(1)+8=-1+8=7$

For n=2 , $f(3)=f(2+1)=-2f(2)+8=-1(7)+8=1$

For n=3 , $f(4)=f(3+1)=-2f(3)+8=-1(1)+8=7$

For n=4 , $f(5)=f(4+1)=-2f(4)+8=-1(7)+8=1$

Hence, the first five terms of the given sequence are 1, 7, 1, 7, 1.

7 0

3 years ago

5x + 2 y = 7 4x + y = 8

dsp73

4y.
Is the answer
Hope this helps

8 0

2 years ago