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Arturiano [62]
3 years ago
10

Help me substitution method define variables

Mathematics
1 answer:
Rina8888 [55]3 years ago
7 0
\left \{ {{S=14+L} (I) \atop {S+L=124}(II)} \right.

<span>Substitute (I) into (II), we have:
</span>S+L=124
(14+L)+L=124
14 + 2L = 124
2L = 124 - 14
2L = 110
L =  \frac{110}{2}
\boxed{L = 55}

<span>Replace (II) in (I), we have:
</span>S=14+L
S = 14+ 55
\boxed{S = 69}

Answer:
each student sell: 
Lori = 55 pizzas
Steve = 69 pizzas
<span>

</span>
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A display case of shirts are marked 10 for $31. If Opal wants to buy 120 shirts, how much will Opal spend (not including tax)?
Lemur [1.5K]
If the shirts all cost the same you would do 120 divided by 10 and that’s 12.you then multiple 31 by 12 and you get 372 so d
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2 years ago
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A student dissolves some solid sodium chloride in a beaker of water.
Margarita [4]
Solute = what is dissolved

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You take it from here.
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3 years ago
Identify the zero(s) of <img src="https://tex.z-dn.net/?f=f%28x%29%3D4x%5E%7B2%7D%20-%2020x%20-%2056" id="TexFormula1" title="f(
AURORKA [14]

Answer:

x = - 2, x = 7

Step-by-step explanation:

Given

f(x) = 4x² - 20x - 56

To find the zeros let f(x) = 0, that is

4x² - 20x - 56 = 0 ( divide through by 4 )

x² - 5x - 14 = 0 ← in standard form

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Equate each factor to zero and solve for x

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x - 7 = 0 ⇒ x = 7

5 0
2 years ago
ou push a large crate with a force of 100 N to the right . What force could your friend apply in order to cause a balanced force
mina [271]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
traingle abc is an isosceles right triangle with the measure of angle a equal to 90 degrees. the length of segment ac is 6 cm. w
Semmy [17]
Isosceles right triangles are half squares, and if the length of one side is 6cm, that is the length of the other side since both segments are equal. Take the formula to find the area of a square (base times height), apply the side measurement of the triangle (6cm) and divide it in half to find the area of half of it (therefore, finding the area of the isosceles triangle.)

(6x6) / 2
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36 / 2 = 18

The area of the isosceles triangle is 18 square centimeters.
4 0
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