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jek_recluse [69]
3 years ago
5

(d) 320 If the measurement of two angles of a triangle are 72º and 70%, find third ange in degrees. If the measurement of two an

gles of a triangle are 630 and 100​
Mathematics
1 answer:
goldenfox [79]3 years ago
3 0
Sorry don’t know the answer
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Variable a is 4 more than variable b. Variable a is also 1 less than b. Which of the following pairs of equations best models th
Elis [28]
B=a+4 that is what the answer will be.
4 0
3 years ago
Which is faster a car driving at a rate of 40 kph or a car at driving at a rate of 15 metres a second
LuckyWell [14K]
40 kph is equal to abt 11 mps so that means 40kph is faster
7 0
3 years ago
Here is a list of ingredients:
svlad2 [7]

Answer:

2025g

Step-by-step explanation:

To solve this problem we need to take the 450g and multiply it by 4.5 (as it is 4.5 times the amount of the original recipe. 450x4+225 is the easiest way to do the math and your minced beef equals out to 2025g and your answer!

4 0
2 years ago
Which second-degree polynomial function has a leading coefficient of –1 and root 5 with multiplicity 2?
PIT_PIT [208]
A second degree polynomial function has the general form:

                  \displaystyle{f(x)=ax^2+bx+c, where a\neq0.

The leading coefficient is a, so we have a=-1.

5 is a double root means that :

i) f(5)=0,
ii) the discriminant D is 0, where D=b^2-4ac.

Substituting x=5, we have

                                        f(5)=a(5)^2+b(5)+c,

and since f(5)=0, and a is -1 we have:

                                          0=-25+5b+c
thus c=25-5b.


By ii) \displaystyle{b^2-4ac=0.

Substituting a with -1 and c with 25-5b we have:
                                     
          \displaystyle{b^2-4ac=0
          \displaystyle{b^2-4(-1)(25-5b)=0
          \displaystyle{b^2+4(25-5b)=0
          \displaystyle{b^2-20b+100=0
          \displaystyle{(b-10)^2=0
          \displaystyle{b=10 


Finally we find c: c=25-5b=25-50=-25

Thus the function is        \displaystyle{f(x)=-x^2+10x-25


Remark: It is also possible to solve the problem by considering the form

f(x)=-1(x-5)^2 directly.

In general, if a quadratic function has leading coefficient a, and has a root r of multiplicity 2, then its form is f(x)=a(x-r)^2
5 0
3 years ago
Read 2 more answers
Please help me!! Fifteen points
klio [65]

Answer:

D. 144

Step-by-step explanation:

a straight line is 180° so you do 180-36

5 0
3 years ago
Read 2 more answers
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