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mrs_skeptik [129]
3 years ago
10

I need help can someone please help me to understand this

Mathematics
1 answer:
krek1111 [17]3 years ago
5 0
I'm not sure but I think that he had $240 in his savings account. I not sure if the method I used is correct so look at someone else's answer if they have a different amount of money.
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32.8g of sugar is needed to make 4 cakes. How much sugar is needed for 7 cakes?
allochka39001 [22]

Answer:

57.4g

Step-by-step explanation:

32.8g of sugar is needed to make 4 cakes. How much sugar is needed for 7 cakes?

From the above questions, we know that:

4 cakes = 32.8g

7 cakes = x g

Cross Multiply

4 × xg = 7 × 32.8g

x = 7 × 32.8g/4

x = 57.4 g

Therefore, 57.4g is needed for 7 cakes

6 0
3 years ago
Use the quadratic formula to solve x2 + 2x - 120 = 0. Think about what other method could also be used to solve this equation. a
pshichka [43]

Answer:

x = 10 , -12

Step-by-step explanation:

Solution:-

- The given quadratic equation is to be solved using the quadratic formula. The general form of a quadratic equation is:

                           ax^2 + bx + c =0  

Where, [ a , b and c are constants ]

- The quadratic formula is given as:

                       

                           x = \frac{-b+/-\sqrt{b^2 - 4*a*c} }{2a}

- The given equation is:

                             x^2 + 2x - 120 = 0

Where, a = 1 , b = 2 , c = -120

- Solve using quadratic formula:

                       x = \frac{-2+/-\sqrt{2^2 - 4*1*(-120)} }{2*1}\\\\x = \frac{-2+/-\sqrt{4 + 480} }{2}\\\\x = \frac{-2+/-(22) }{2}\\\\\\x = 10 , -12    

7 0
3 years ago
If the circumfrences is 10m, where can we susbistute 10 into the equation C= pi diameter.
Genrish500 [490]

Answer:

B

Step-by-step explanation:

It would be 10 = pi diameter bc 10 is the circumfrernce. so that'd be B

6 0
3 years ago
Read 2 more answers
If you travel 1000 feet in 5 minutes, what is your speed in feet per minute?
Ilia_Sergeevich [38]

Answer:

200 feet per minute

Step-by-step explanation:

1000 / 5 gives us the feet per minute

200 feet per minute

Answer:  200 feet per minute

4 0
3 years ago
How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equation?​
Kazeer [188]
It doesn’t really matter which variable you isolate first but usually you would use the one that’s by itself already. like for example one of the equations was y = 8. you would already have your y solve for so you would just have to plug that in for y in the other equation. personally, i usually do x first unless one of the equations has either x or y by itself already. i think its easier to just do x first and then solve for y after that, but it just depends on what the equations are; sometimes it might be easier to just do y first. hope this helps!
5 0
3 years ago
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