Solve using EQUATIONS (with step by step explanation) 3x+y=-9 y=5x+7

Mathematics

1 answer:

PSYCHO15rus [73]3 years ago

8 0

Answer:

3x+y=-9= 0 then y=5x+7=0

Step-by-step explanation:

Slope=−

2.000

6.000

=−3.000

x−intercept=−

=−3

y−intercept=−

=−9.00000

2.000

10.000

=5.000

x−intercept=

−5

=−1.40000

y−intercept=

=7.00000 i believe

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${\boxed{\mathcal{\purple{D.\:81}}}}$ ✅

$\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\orange{:}}}}}$

$( {3})^{ \frac{11}{5} } \div {3}^{ \frac{ - 9}{5} } \\ \\=( {3})^{ \frac{11}{5} - ( \frac{ - 9}{5} ) } \\ \\ = ( {3})^{ \frac{11}{5} + \frac{9}{5} } \\ \\ = ( {3})^{ \frac{11 + 9}{5} } \\ \\ = ( {3})^{ \frac{20}{5} } \\ \\ = ( {3})^{4} \\ \\ = ( \: 3 \times 3 \times 3 \times 3 \: ) \\ \\ = 81$