All categories

3 years ago

How do you solve: 4/10y+28=0

Mathematics

1 answer:

Bezzdna [24]3 years ago

3 0

Answer:

Step-by-step explanation:

$\dfrac{4}{10}y+28=0\qquad\text{subtract 28 from both sides}\\\\\dfrac{4:2}{10:2}y=-28\\\\\dfrac{2}{5}y=-28\qquad\text{multiply both sides by 5}\\\\5\!\!\!\!\diagup^1\cdot\dfrac{2}{5\!\!\!\!\diagup_1}y=-140\\\\2y=-140\qquad\text{divide both sides by 2}\\\\y=-70$

You might be interested in

We have a bag of three biased coins a, b, and c with probabilities of coming up headsof 20%, 60%, and 80%, respectively. One coi

Alexandra [31]

Answer:

150

Step-by-step explanation:

is my answer it will help you

6 0

3 years ago

Can I plz have some help

ella [17]

I think it is 63 because a triangle equals 180

6 0

4 years ago

Which of the following options have the same value as 30\%30%30, percent of 818181?

Nataly_w [17]

Answer:

Option B is correct = $0.3 \times 81$

Step-by-step explanation:

<u>The complete question is:</u> Which of the following options have the same value as 30% of 81?

Group of choices is:

(A) $\frac{30}{100}\times 81 \times 100$

(B) $0.3 \times 81$

(D) $\frac{3}{10}\times 81 \times 10$

(E) $30 \times 81$

Now, the expression given to us is 30% of 81.

Simplifying the above expression we get;

30% of 81 = $\frac{30}{100} \times 81$

= $\frac{3}{10} \times 81$ = $0.3 \times 81$

Now, we will solve each of the given options and then see which option matches with our calculation.

Option (A) is given;

$\frac{30}{100}\times 81 \times 100$ = $30 \times 81$

This doesn't match with our answer, so this option is not correct.

Option (B) is given;

$0.3 \times 81$

<u><em>This matches with our answer, so this option is correct.</em></u>

Option (C) is given;

$0.03 \times 81$

This doesn't match with our answer, so this option is not correct.

Option (D) is given;

$\frac{3}{10}\times 81 \times 10$ = $3 \times 81$

This doesn't match with our answer, so this option is not correct.

Option (E) is given;

$30 \times 81$

This doesn't match with our answer, so this option is not correct.

6 0

4 years ago

The drama club can wash 9 cars in 40 minutes at this rate how many cars can they wash in 2 hours

dolphi86 [110]

Ok... so 9 cars in 40 min means it took ABOUT 4 min to wash each car. So it will be 4x120 is your equation if that helps. I’m not quite sure if this is right you might need to check your work. I don’t know what grade your in but I’m just starting 5th

7 0

4 years ago

8. On a winter's day, the temperature at 6 P.M.

Ivahew [28]

Answer:5 hours because -2.5*5=-12.5

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers