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QveST [7]
3 years ago
8

Pls help with 29 and 19

Mathematics
1 answer:
Phoenix [80]3 years ago
5 0
You should have written like this
1 hour /16 = x hour /100
x=100/16=25/4=6.25
but it asks how many hours after first hour
6.25-1=5.25
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Jimmy set his score for his math test. After the math teacher returnee his paper to him, he realized that if he increased his ta
mixer [17]
When ever you have percentages, it should be helpful to bear in mind you can express them as multipliers. In this case, it will be helpful.
So, if we let:
a = test score
b = target score
then, using the information given:
a = 1.1b + 1
a = 1.15b - 3
and we get simultaneous equations.
'1.1' and '1.15' are the multipliers that I got using the percentages. Multiplying a value by 1.1 is the equivalent of increasing the value by 10%. If you multiplied it by 0.1 (which is the same as dividing by 10), you would get just 10% of the value.
Back to the simultaneous equations, we can just solve them now:
There are a number of ways to do this but I will use my preferred method:
Rearrange to express in terms of b:
a = 1.1b + 1
then b = (a - 1)/1.1
a = 1.15b - 3
then b = (a + 3)/1.15
Since they are both equal to b, they are of the same value so we can set them equal to each other and solve for a:
(a - 1)/1.1 = (a + 3)/1.15
1.15 * (a - 1) = 1.1 * (a + 3)
1.15a - 1.15 = 1.1a + 3.3
0.05a = 4.45
a = 89

8 0
3 years ago
12 + 4x > 24 or 10 - 12x > 22
Wewaii [24]

Answer:

10 - 12 × > 22 Yan Yong sagot

8 0
3 years ago
A rectangle with an area of 5/8 ft² is dilated by a factor of 8. What is the area of the dilated rectangle?
gulaghasi [49]

Answer:

40 ft²

Step-by-step explanation:

Let the length of the original rectangle be L and original Breadth be B

it is given that the original area  is 5/8 ft²

i.e.

Original Length x Original Breadth = Original Area, or,

LB = 5/8 ft² ------------------(1)

Given that the dilation factor is 8,

Hence,

New Length = 8L and New Breadth = 8B

THerefore,

New Area = 8L x 8B

= 64 LB  (from (1) above , we know that LB = 5/8 ft², substitute into expression)

= 64 (5/8)

= 40 ft²

4 0
4 years ago
Can y'all just please go help me on the ones I've posted:(
DIA [1.3K]

Answer:

YEah sure!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Step-by-step explanation:

help me too like im doing a test rn

8 0
3 years ago
This is not from a essay or test please do not report it
Anon25 [30]

Answer:

1.    1:2

2.   x=12

3.   $25:$20

4.    15 cats

5.    16 t

6.   p=4

7.    $15/6 = 2.50

8.   10/5=2   8/2=4     x=4

8b.    8:10=4:5

9.   270/3=90=1 person    90 x 10=$900

you need $900 to bring 10 people on the fishing trip.

Step-by-step explanation:

3.   75/3=25    100/5=20

8 0
2 years ago
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