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a_sh-v [17]
3 years ago
8

1/3(6z+7.2)=0.5(8z+2)-0.4 please hurry this is for now

Mathematics
1 answer:
Crazy boy [7]3 years ago
3 0

Answer:

z = - 0.78

Step-by-step explanation:

Given:

1/3(6z+7.2)=0.5(8z+2)-0.4

Open parenthesis

2z + 2.4 = (4z + 1) - 0.4

2z + 2.4 = - 1.6z - 0.4

Collect like terms

2z + 1.6z = - 0.4 - 2.4

3.6z = -2.8

z = -2.8 / 3.6

= - 0.78

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REY [17]
No sure sorry i just need my question answered have a good day:)
7 0
3 years ago
Equations in Iwo V Solve the system by the addition method. 3x+8y=6 3x-8y=6 Select the correct choice below and, if necessary, f
sweet [91]

Answer:

A. there is exactly one solution. the solution set is {(2, 0)}.

Step-by-step explanation:

3x + 8y = 6

3x - 8y = 6

when we add these 2 equations, we get

6x + 0 = 12

6x = 12

x = 2

now we use one of the original equations to get y :

3×2 + 8y = 6

6 + 8y = 6

8y = 0

y = 0

4 0
2 years ago
Read 2 more answers
The ratio of the number of songs Brody bought to the number of songs Jayliah bought is 2:3. The ratio of the number of songs Jay
weqwewe [10]

Answer:

Brody purchased 16 songs.

Step-by-step explanation:

Ratio of the number of songs purchased by Brody(B) and Jayliah(J) = 2 : 3

\frac{B}{J}=\frac{2}{3} ------(1)

Similarly ratio of the songs purchased by Jayliah(J) and Sadie(S) = 4 : 5

\frac{J}{S}=\frac{4}{5} -------(2)

If Sadie bought the songs (S) = 30

From equation (2),

\frac{J}{30}=\frac{4}{5}

J = \frac{4\times 30}{5}

J = 24

By substituting the value J = 24 in equation (1),

\frac{B}{24}= \frac{2}{3}

B = \frac{2\times 24}{3}

B = 16

Therefore, number of songs purchased by Brody = 16.

3 0
3 years ago
Please help me, I need help so bad. make sure to write the full calculation please. If you want bonus points please answer the s
cluponka [151]

Answer:

1. About 9 left. 2. £21 left

Step-by-step explanation:

First, you do 65 ÷ 3 = 21.7 if rounding to the tenths, 21.67 if to the hundredths, and so on. Then you do 21.67 - 12 = 9.67. But since it is cards, I would say about 9 left.

First you add the £20 to the £70 to get £90. then you multiply 7×3 to get £21 spent on books. After that, multiply 12×4 to get £48 spent on games. then do 48 + 21 = 69. 90-69= 21.

Here is the equation....

(70+20)-[(7×3)+(12×4)] = £21

6 0
3 years ago
WILL GIVE BRAINLST <br> ANSWER PLSS
Elodia [21]

Don't lie about giving branliest. People will help regardless.

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3 years ago
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