60+3=63
10x6+3=63
7x9=63
20x3+3=63
Answer:
3.5 tons
Step-by-step explanation:
Divide the pounds for the male by the amount of tons it is.
8000/4 = 2000
This is how many pounds are in one ton. Divide the weight of the female by this.
7000/2000 = 3.5
The female weighs 3.5 tons.
We have the following:
solving:
![\begin{gathered} 10x^2-x+9=0 \\ 10x^2-x+9-9=-9 \\ 10x^2-x=-9 \\ \frac{10}{10}x^2-\frac{x}{10}=-\frac{9}{10} \\ x^2-\frac{x}{10}+(-\frac{1}{20})^2=-\frac{9}{10}+(-\frac{1}{20})^2 \\ (x-\frac{1}{20})^2=-\frac{359}{400}\rightarrow(x-\frac{1}{20})=\sqrt[]{-\frac{359}{400}} \\ x=\frac{1}{20}+i\frac{\sqrt{359}}{20} \\ x=\frac{1}{20}-i\frac{\sqrt{359}}{20} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%2010x%5E2-x%2B9%3D0%20%5C%5C%2010x%5E2-x%2B9-9%3D-9%20%5C%5C%2010x%5E2-x%3D-9%20%5C%5C%20%5Cfrac%7B10%7D%7B10%7Dx%5E2-%5Cfrac%7Bx%7D%7B10%7D%3D-%5Cfrac%7B9%7D%7B10%7D%20%5C%5C%20x%5E2-%5Cfrac%7Bx%7D%7B10%7D%2B%28-%5Cfrac%7B1%7D%7B20%7D%29%5E2%3D-%5Cfrac%7B9%7D%7B10%7D%2B%28-%5Cfrac%7B1%7D%7B20%7D%29%5E2%20%5C%5C%20%28x-%5Cfrac%7B1%7D%7B20%7D%29%5E2%3D-%5Cfrac%7B359%7D%7B400%7D%5Crightarrow%28x-%5Cfrac%7B1%7D%7B20%7D%29%3D%5Csqrt%5B%5D%7B-%5Cfrac%7B359%7D%7B400%7D%7D%20%5C%5C%20x%3D%5Cfrac%7B1%7D%7B20%7D%2Bi%5Cfrac%7B%5Csqrt%7B359%7D%7D%7B20%7D%20%5C%5C%20x%3D%5Cfrac%7B1%7D%7B20%7D-i%5Cfrac%7B%5Csqrt%7B359%7D%7D%7B20%7D%20%5Cend%7Bgathered%7D)
The answer is the last option
X=amount of apples bought. (in pounds)
y=amount of bananas boutht (in pounds)
We can suggest this system of equations:
x+y=3.8
1.9x+0.75y=5.84
We can solve this system of euqtions by substitution method.
x+y=3.8 ⇒ y=3.8-x
1.9x+0.75(3.8-x)=5.84
1.9x+2.85-0.75x=5.85
1.15x=5.84-2.85
1.15x=2.99
x=2.99/1.15
x=2.6
y=3.8-x
y=3.8-2.6
y=1.2
Answer: C. 2.6 pounds of apples; 1.2 pounds of bananas.
It’s B, because you do 3-15 and that equals 12 and then you do 3 divided by 12 and that’s 4.
