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dlinn [17]
3 years ago
13

Solving equations with variables on both sides. Check answer pls

Mathematics
2 answers:
Agata [3.3K]3 years ago
6 0
5(y_4)=7(2y+1)
5y_20=14y+7
_27=9y
y=_3
Law Incorporation [45]3 years ago
3 0
Okay so first you distribute to both sides(the arrows). then you subtract 5y to both sides and bring everything down. then you subtract 7 to both sides and get -27=9y and divide by 9 to get the y alone .

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Jessica wants to take three books on vacation with her. She has five books to choose from. How many possible combinations of thr
Sedaia [141]

It would have to be 3/5

4 0
3 years ago
Read 2 more answers
Evaluate the dot product of (7, 5) and (- 5, 4)
melamori03 [73]

Answer:

The dot product of (7,5) and (-5,4) is -15

Step-by-step explanation:

Given

(7,5) and (-5,4)

Required

Determine the dot product

Dot product is calculated using the following formula;

a.b = {a_1b_1+a_2b_2+...+a_nb_n}

Let a = (7,5) and b = (-5,4);

The above formula becomes

a.b = {7*-5+5*4}

a.b = {-35+20}

a.b = {-15}

Hence, the dot product of (7,5) and (-5,4) is -15

5 0
3 years ago
If OB= 17 and AB = 30, then OR =
Novay_Z [31]
The correct answer is 8
Because
In triangle ORB
OR=(OB^2-RB^2)^1/2
OR=(17^2-15^2)^1/2
OR=(289-225)^1/2
OR=(64)^1/2
OR=8
RB=AB/2 so I kept its value 15 and ^1/2 refers to square root
6 0
3 years ago
Read 2 more answers
C) The ratio between an exterior angle and an interior angle of a polygon is 1:5.
Bingel [31]

Answer:

30° and 12

Step-by-step explanation:

The sum of the exterior angle and the interior angle = 180°

sum the parts of the ratio, 1 + 5 = 6 parts

Divide 180° by 6 to find the value of one part of the ratio

180° ÷ 6 = 30° ← value of 1 part of the ratio

(i)

The exterior angle = 30°

(ii)

The sum of the exterior angles of a polygon is 360°

To find the number of sides n divide 360 by 30 , that is

n = 360 ÷ 30 = 12

5 0
3 years ago
Round your answer to the nearest hundredth.<br><br> PLEASE HELP ME
g100num [7]
I think you have to multiply
6 0
3 years ago
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