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11111nata11111 [884]
2 years ago
12

Solve by substitution: 7x+4y=14 and x+2y=12 HURRY I'LL GIVE BRAINLIEST!!

Mathematics
1 answer:
antiseptic1488 [7]2 years ago
5 0

Answer:

x = -2

y = 7

Step-by-step explanation:

x = 12 - 2y

7(12 - 2y) + 4y = 14

84 - 14y + 4y = 14

84 - 10y = 14

10y = 70

y = 7

x = 12 - 2 x 7

x = 12 - 14

x = -2

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Find the sum of the geometric series for which a = 160, r = 0.5, and n = 6.
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\\ \sf\longmapsto S_n=\dfrac{a(1-r^n)}{1-r}

\\ \sf\longmapsto S_n=\dfrac{160(1-0.5^6)}{1-0.5}

\\ \sf\longmapsto S_n=\dfrac{160(1-0.015625)}{0.5}

\\ \sf\longmapsto S_n=\dfrac{160(0.984378)}{0.5}

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2 years ago
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A cone with a radius of 6 cm has a volume of 1200 cm3. What is the height of the cone? (The volume of a cone is given by the for
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Answer:

  • 31.8 cm

Step-by-step explanation:

<u>Volume of a cone:</u>

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None of the choices is correct

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Mandana is ordering new tile for her kitchen floor. The area of the floor is 111.8 square feet, and she wants to order between 1
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Answer:

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Step-by-step explanation:

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3 years ago
1) Find the sum 4.5 + 5.9
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Answer:

Step-by-step explanation:

Steps are below

step 1

4.5 + 5.9  equation

step 2

4.5 + 5.9  add them together by moving the points

4.5 + 5.9

10.4

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3 years ago
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