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SL10355
17.11.2019 •
Mathematics
1. what is ad/ab in simplest form
a. 10/3
b. 1/3
c. 17/5
d. 3
what is slope of be/ slope of ae in simplest form?
a. 4
b. 5/4
c. 25/4
d. 5
3. what is the value of x in the proportion (x-1)/5= (4x+2)/35?
a. 1/3
b. 1/5
c. 1/4
d. 3
4. what is the value of x in the proportion
x+1 = 15
x+3 = 21
5. the lengths of the sides of a triangle are in the extended ratio 3 : 10 : 12. the perimeter is 400 cm. what is the length of the longest side in centimeters? ?
a. 16 cm
b. 192 cm
c. 160 cm
d. 48 cm
Solved
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Ответ:
1. What is AD/AM in the simplest form:
AD/AB is the ratio of AD to AB. This will calculated as follows:
AD=9 units
AB=3 units
thus:
9/3=3
Hence, we conclude that the answer is D. 3
2] What is slope of BE/ slope of AE in simplest form:
slope=(Δy-axis)/(Δx-axis)
slope of AE
=(5-0)/(4-0)
=5/4
slope BE
slope=(5-0)/(4-3)=5/1=5
therefore the ratio of the two slope will be:
BE/AE
=5/(5/4)
=4
The answer is A.4
3. What is the value of x in the proportion (x-1)/5=(4x+2)/35?
To get the value of x we solve the above proportion:
(x-1)/5=(4x+2)/35
35(x-1)=5(4x+2)
35x-35=20x+10
putting like terms together we get:
35x-20x=10+35
15x=45
dividing both sides by 15
x=45/15
x=3
Hence the answer is B.3
4. What is the value of x in the proportion:
(x+1)/(x+3)=15/21
to get the value of x we solve the above:
first we begin by cross multiplying the proportion, this will give us:
21(x+1)=15(x+3)
21x+21=15x+45
putting like terms together we get:
21x-15x=45-21
6x=24
dividing both sides by 6 we get
x=4
∴ x=4
5. The lengths of the sides of a triangle are in extended ratio 3:10:12. The perimeter is 400 cm. What is the length of the longest side in cm.
solution:
Here we introduce the variable x such that the perimeter is:
3x+10x+12x=400
25x=400
x=400/25
x=16
The longest side will be:
12×16=192 cm
Ответ:
All the ratios for all the given questions have their answers as;
1) Option D; 3
2) Option A; 4
3) Option D; 3
4) X = 4
5) Option B; 192 cm
From the given graph, we have the following dimensions;
AB = 3
AC = 5
AD = 9
1) We want to find AD/AB;
From the given dimensions;
AD = 9 and AB = 3.
Thus;
AD/AB = 9/3
AD/AB =3
Option D; 3
2) We want to find the slope of BE/slope of AE;
Formula for slope between two points is;
m = (y₂ - y₁)/(x₂ - x₁)
Thus;
Slope of AE;
m_ae = (5-0)/(4-0)
m_ae =5/4
Slope of BE
m_be = (5-0)/(4-3)
m_be = 5/1
m_be = 5
Thus; slope of BE/Slope of AE is;
M_be/m_ae = 5/(⁵/₄)
M_be/m_ae = 4
Option A; 4
3) We want to find the value of x in the proportion (x - 1)/5 = (4x + 2)/35.
We will cross multiply to get;
35(x - 1) = 5(4x + 2)
35x - 35 = 20x + 10
Rearranging to get;
35x - 20x = 10 + 35
15x = 45
divide both sides by 15 to get;
15x/15 = 45/15
x = 3
Option B; 3
4) We want to find the value of x in the proportion: (x + 1)/(x + 3) = 15/21
We will cross multiply to get;
21(x + 1) = 15(x + 3)
21x + 21 = 15x + 45
Rearranging to get;
21x - 15x = 45 - 21
6x = 24
divide both sides by 6 to get;
x = 4
5) We are told that the lengths of the sides of a triangle are in extended ratio 3:10:12 and that the perimeter is 400 cm.
Thus;
This means the original lengths were all divided by a common number. Let us call this number x. Since perimeter is sum of all sides, then;
3x + 10x + 12x = 400
25x = 400
Divide both sides by 25 to get;
x = 400/25
x = 16
The longest side = 12 × 16
Longest side = 192 cm
Option B; 192 cm
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Ответ:
Step-by-step explanation:
Step 1. 95-8=86 (bought 1 plane kit)
Step 2. Find how many planes he can buy with the remainder of the money
86/8=10.75
Therefore he can only buy 10 planes to donate to the animal shelter as he will won't have enough money to by 11 planes.