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AfilCa [17]
3 years ago
7

Read the photo and please answer!!

Mathematics
2 answers:
OverLord2011 [107]3 years ago
8 0

Answer:

It will be 3 + 3x= 45 because 3 is how much she already know and 3 with the x is how much she will learn. x=15 because 3 × 15 equals 45so that's how many weeks. pls make me brainliest thank you!:) btw the other person not right!!

Readme [11.4K]3 years ago
5 0

Answer:

<em> 3 + 3x = 45 ; x = 14 </em>

Step-by-step explanation:

45 = 3x + 3 ⇒ <em>x = 14</em>

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The question is in the picture.
dangina [55]
<h2><u>Part A:</u></h2>

Let's denote no of seats in first row with r1 , second row with r2.....and so on.

r1=5

Since next row will have 10 additional row each time when we move to next row,

So,

r2=5+10=15

r3=15+10=25

<u>Using the terms r1,r2 and r3 , we can find explicit formula</u>

r1=5=5+0=5+0×10=5+(1-1)×10

r2=15=5+10=5+(2-1)×10

r3=25=5+20=5+(3-1)×10

<u>So for nth row,</u>

rn=5+(n-1)×10

Since 5=r1 and 10=common difference (d)

rn=r1+(n-1)d

Since 'a' is a convention term for 1st term,

<h3><u>⇒</u><u>rn=a+(n-1)d</u></h3>

which is an explicit formula to find no of seats in any given row.

<h2><u>Part B:</u></h2>

Using above explicit formula, we can calculate no of seats in 7th row,

r7=5+(7-1)×10

r7=5+(7-1)×10 =5+6×10

r7=5+(7-1)×10 =5+6×10 =65

which is the no of seats in 7th row.

8 0
3 years ago
Chandra spends 15 minutes doing 4 math problems.She spends the same amount of of time on each problem.How many minutes does she
Serjik [45]

Answer: 3 minutes and 45 seconds

Step-by-step explanation: first, you divide 15 by 4 and that's your answer. Hope this helps!

6 0
3 years ago
The longest side of an acute isosceles triangle is 12 centimeters. Rounded to the nearest tenth, what is the smallest possible l
anygoal [31]

Answer:

Its 8.5 just took the test

Step-by-step explanation:

8 0
3 years ago
Can someone please help me with the math problem?
Volgvan

Answer:

i think that the answer is 147

Step-by-step explanation:

i believe that you would be able to multiply 3 time 49 and that is your answer.

4 0
3 years ago
Read 2 more answers
A tent forms an equilateral triangular prism, with both triangular faces exposed. each side of the triangular face has a length
Soloha48 [4]
Given:
Equilateral Triangular Prism
Each side of the triangular face has a length of 196cm
The tent is 250cm long

I have attached an image of the tent. Since the height of the tent is also the height of the triangle, I will solve for the height of the triangle using Pythagorean theorem.

I divided the equilateral triangle into 2 right triangle. The height then becomes the long leg of the triangle. The hypotenuse is 196cm and the short leg is 98cm, half of one side of the triangle.

a² + b² = c²
a² = c² - b²
a² = (196cm)² - (98cm)²
a² = 38,416cm² - 9,604cm²
a² = 28,812cm²
a = √28,812cm² 
a = 169.74cm

The height of the tent is 169.74 centimeters. 

6 0
3 years ago
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