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serg [7]
3 years ago
9

The ratio of girls to boys in Liza’s classroom is 5

Mathematics
1 answer:
Gwar [14]3 years ago
7 0

Answer:

15 girls

Step-by-step explanation:

Let

x ----> the number of girls in Liza's classroom

y ----> the number of boys in Liza's classroom

we know that

\frac{x}{y}=\frac{5}{4}  

x=\frac{5}{4}y -----> equation A

x+y=27 ----> equation B

solve the system by substitution

substitute equation A in equation B

\frac{5}{4}y+y=27

solve for y

\frac{9}{4}y=27

y=27(4)/9\\\\y=12\ boys

<em>Find the value of x</em>

x=\frac{5}{4}(12)=15\ girls

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Matrix a is a 6 × 5 matrix. which order of matrix can be multiplied by matrix a to create matrix ab?
mezya [45]

Order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

<h3>What is a matrix?</h3>
  • A matrix is a rectangular array or table of numbers, symbols, or expressions that are organized in rows and columns to represent a mathematical object or an attribute of such an object in mathematics.
  • For instance, consider a matrix with two rows and three columns.

To find the order of matrix:

  • We must first check the dimension of two matrices, say matrix A by matrix B, before we may multiply them.
  • Multiplication is achievable if the number of columns in the first matrix, A, equals the number of rows in the second matrix.
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  • This means the given matrix contains six rows and five columns.
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  • The only matrix with 5 rows among the above alternatives is the matrix with dimension (B) 5 × 6.

To prove:

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Therefore, order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

Know more about matrix here:

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7 0
2 years ago
Please answer I will mark u brainliest or wtv its called
Lelu [443]

Answer:

B) 10 cm

Step-by-step explanation:

Hello!

We can use the Pythagorean theorem to solve for the hypotenuse.

Formula: a^2 + b^2 = c^2

  • a = leg
  • b = leg
  • c = hypotenuse

We can plug in the values for each leg to solve for the hypotenuse.

<h3>Solve for c</h3>
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2 years ago
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Step-by-step explanation:

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