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3 years ago

How do you solve 7.2 / .9 + 4 x 4

Mathematics

1 answer:

NikAS [45]3 years ago

8 0

The answer is 24

hope I helped

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Simplify the expression 3(9+4x−5). <br><br> ill give brainlist

Mazyrski [523]

12x+12 step by step below

6 0

2 years ago

#13. 6x — Зу = 8

Ne4ueva [31]

#13

6x — Зу = 8
3y = 6x - 8
y = 6/3x - 8/3
y = 2x - 8/3

The slope = 2
The y- intercept = - 8/3

#14

7x = 5y + 2
5y = 7x - 2
y = 7/5x - 2/5
y = 1.4x - 0.4

The slope = 1.4
The y- intercept = - 0.4

#15

- 6у + 4х = 8
6y = 4x - 8
y = 4/6x - 8/6
y = 2/3x - 4/3

The slope = 2/3
The y- intercept = -4/3

#16 is not clear

8 0

2 years ago

Find the circumference of the circle.<br> 7 m

Nutka1998 [239]

Answer:

43.96m is the answer

Step-by-step explanation:

circumference of circle=2πr

=2*3.14*7

=43.96m

8 0

2 years ago

There are 13 dogs at the dog park on a busy Saturday. 1 of them is a labrador retriever.What is the probability that a randomly

masha68 [24]

Answer:

there is a 1/13 (one in 13) chance that they will randomly pick a labrador.

Step-by-step explanation: If you need more help just message me :)

6 0

3 years ago

Read 2 more answers

In a certain year, brand A of heart-rate watch cost $39.99 and brand B cost $59.99. A nonprofit community health organizatio

Oksi-84 [34.3K]

Answer:

Brand A = 21 heart-rate watches.

Brand B = 13 heart-rate watches.

Step-by-step explanation:

Let A be the number of Brand A heart watches and B be the number of Brand B heart watches.

We have been given that a nonprofit community health organization purchased 34 heart-rate watches for use at a wellness center.

We can represent this information in an equation as:

$A+B=34...(1)$

We have been given that in a certain year, brand A of heart-rate watch cost $39.99 and brand B cost $59.99 and the organization spent $1619.66 for the watches.

We can represent this information in an equation as:

$39.99*A+59.99*B=1619.66...(2)$

We will use substitution method to solve our system of equations.

From equation (1) we will get,

$A=34-B$

Substituting $A=34-B$ in equation(2) we will get,

$39.99*(34-B)+59.99*B=1619.66$

$1359.66-39.99*B+59.99*B=1619.66$

$-39.99*B+59.99*B=1619.66-1359.66$

$20*B=260$

$B=\frac{260}{20}$

$B=13$

Therefore, the organisation purchased 13 heart-rate watches of brand B.

Now let us substitute B=13 in equation (1).

$A+13=34$

$A+13-13=34-13$

$A=21$

Therefore, the organisation purchased 21 heart-rate watches of brand A.

8 0

2 years ago