|8| + |-4| Evaluate the Expression
2 answers:
You might be interested in
Answer:
kg of plant food
Step-by-step explanation:
<em>The second question doesn't have choices, so I'll answer the first question only</em>.
In order to know how much plant food Sheldon has, you have to<em> </em><em>subtract </em><em> kg of plant food used for the strawberry plants from </em>
<em> kg of plant food</em>. Then,
kg will be subtracted from the <u>difference</u>.
-
= ?
<em>Let's convert both fractions into improper fractions first, so it will be easier to subtract.</em>
Now, let's subtract.
-
=
or
kg of plant food
Next, <em>you have to subtract </em><em> kg of plant food used for the tomato plants from the remaining plant food of </em>
<em> kg.</em>
Let's subtract again.
=
kg of plant food
Therefore, Sheldon has kg of plant food left.
Answer:
x = 17 and y = 37
Step-by-step explanation:
Let the numbers be x and y.
y = 3 + 2x
xy = 629
substituting y in the second equation we get
x(3+2x) = 629
3x + 2 = 629
2 + 3x - 629 = 0
Solving a quadratic equation by using its formula:
x = [-3 ±√(9-4(2)(-629)] / 4
x = [-3 ± √5041] / 4
x = [-3 ± 71] / 4
x = 17 and
Ignore the negative number in x and just use x = 17 in the first equation we get
y = 3 + 2(17) = 37